Minor refactoring

app/src/main/AndroidManifest.xml

 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-          package="chat.rocket.android">
+    package="chat.rocket.android">
 
-    <uses-permission android:name="android.permission.INTERNET"/>
-    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
-    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
-    <uses-permission android:name="android.permission.WAKE_LOCK"/>
-    <uses-permission android:name="android.permission.VIBRATE"/>
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
+    <uses-permission android:name="android.permission.WAKE_LOCK" />
+    <uses-permission android:name="android.permission.VIBRATE" />
 
     <permission
         android:name="chat.rocket.android.permission.C2D_MESSAGE"
-        android:protectionLevel="signature"/>
+        android:protectionLevel="signature" />
 
-    <uses-permission android:name="chat.rocket.android.permission.C2D_MESSAGE"/>
+    <uses-permission android:name="chat.rocket.android.permission.C2D_MESSAGE" />
 
     <application
         android:name=".RocketChatApplication"
@@ -26,39 +27,40 @@
             android:configChanges="orientation|screenSize"
             android:windowSoftInputMode="adjustResize">
             <intent-filter>
-                <action android:name="android.intent.action.MAIN"/>
+                <action android:name="android.intent.action.MAIN" />
 
-                <category android:name="android.intent.category.DEFAULT"/>
-                <category android:name="android.intent.category.LAUNCHER"/>
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
 
         <activity
             android:name=".activity.room.RoomActivity"
             android:configChanges="orientation|screenSize"
-            android:windowSoftInputMode="adjustResize"/>
+            android:windowSoftInputMode="adjustResize" />
 
         <activity
             android:name=".activity.AddServerActivity"
             android:configChanges="orientation|screenSize"
-            android:windowSoftInputMode="adjustResize"
-            android:launchMode="singleTop"/>
+            android:launchMode="singleTop"
+            android:windowSoftInputMode="adjustResize" />
 
         <activity
             android:name=".activity.LoginActivity"
             android:configChanges="orientation|screenSize"
-            android:windowSoftInputMode="adjustResize"/>
+            android:windowSoftInputMode="adjustResize" />
 
-        <service android:name=".service.RocketChatService"/>
+        <service android:name=".service.RocketChatService" />
 
         <receiver
             android:name="com.google.android.gms.gcm.GcmReceiver"
             android:exported="true"
             android:permission="com.google.android.c2dm.permission.SEND">
             <intent-filter>
-                <action android:name="com.google.android.c2dm.intent.RECEIVE"/>
-                <action android:name="com.google.android.c2dm.intent.REGISTRATION"/>
-                <category android:name="chat.rocket.android"/>
+                <action android:name="com.google.android.c2dm.intent.RECEIVE" />
+                <action android:name="com.google.android.c2dm.intent.REGISTRATION" />
+
+                <category android:name="chat.rocket.android" />
             </intent-filter>
         </receiver>
 
@@ -67,8 +69,8 @@
             android:exported="true"
             android:permission="com.google.android.c2dm.permission.SEND">
             <intent-filter>
-                <action android:name="com.google.android.c2dm.intent.RECEIVE"/>
-                <category android:name="chat.rocket.android"/>
+                <action android:name="com.google.android.c2dm.intent.RECEIVE" />
+                <category android:name="chat.rocket.android" />
             </intent-filter>
         </receiver>
 
@@ -76,7 +78,8 @@
             android:name="com.google.firebase.iid.FirebaseInstanceIdInternalReceiver"
             android:exported="false" />
 
-        <service android:name="com.google.firebase.iid.FirebaseInstanceIdService"
+        <service
+            android:name="com.google.firebase.iid.FirebaseInstanceIdService"
             android:exported="true">
             <intent-filter android:priority="-500">
                 <action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
@@ -87,7 +90,7 @@
             android:name=".push.gcm.GCMIntentService"
             android:exported="false">
             <intent-filter>
-                <action android:name="com.google.android.c2dm.intent.RECEIVE"/>
+                <action android:name="com.google.android.c2dm.intent.RECEIVE" />
             </intent-filter>
         </service>
 
@@ -95,14 +98,16 @@
             android:name=".push.gcm.GcmInstanceIDListenerService"
             android:exported="false">
             <intent-filter>
-                <action android:name="com.google.android.gms.iid.InstanceID"/>
+                <action android:name="com.google.android.gms.iid.InstanceID" />
             </intent-filter>
         </service>
 
-        <receiver android:name=".push.PushManager$DeleteReceiver"
+        <receiver
+            android:name=".push.PushManager$DeleteReceiver"
             android:exported="false" />
 
-        <receiver android:name=".push.PushManager$ReplyReceiver"
+        <receiver
+            android:name=".push.PushManager$ReplyReceiver"
             android:exported="false" />
 
         <meta-data