Adds animation in chrome custom tabs

rocket-chat-android-widgets/src/main/java/chat/rocket/android/widget/message/RocketChatMessageAttachmentsLayout.java

@@ -173,6 +173,8 @@ public class RocketChatMessageAttachmentsLayout extends LinearLayout {
                 public void onClick(View view) {
                     new CustomTabsIntent.Builder()
                             .setToolbarColor(ContextCompat.getColor(getContext(), R.color.colorPrimary))
+                            .setStartAnimations(getContext(), R.anim.slide_in_right, R.anim.slide_out_left)
+                            .setExitAnimations(getContext(), R.anim.slide_in_left, R.anim.slide_out_right)
                             .build()
                             .launchUrl(getContext(), Uri.parse(link));
                 }

rocket-chat-android-widgets/src/main/res/anim/slide_in_left.xml

+<?xml version="1.0" encoding="utf-8"?>
+<set
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate
+        android:fromXDelta="-100%p"
+        android:toXDelta="0"
+        android:duration="@android:integer/config_mediumAnimTime"/>
+</set>
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rocket-chat-android-widgets/src/main/res/anim/slide_in_right.xml

+<?xml version="1.0" encoding="utf-8"?>
+<set
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate
+        android:fromXDelta="100%p"
+        android:toXDelta="0"
+        android:duration="@android:integer/config_mediumAnimTime"/>
+</set>
\ No newline at end of file

rocket-chat-android-widgets/src/main/res/anim/slide_out_left.xml

+<?xml version="1.0" encoding="utf-8"?>
+<set
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate
+        android:fromXDelta="0"
+        android:toXDelta="-100%p"
+        android:duration="@android:integer/config_mediumAnimTime"/>
+</set>
\ No newline at end of file

rocket-chat-android-widgets/src/main/res/anim/slide_out_right.xml

+<?xml version="1.0" encoding="utf-8"?>
+<set
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate
+        android:fromXDelta="0"
+        android:toXDelta="100%p"
+        android:duration="@android:integer/config_mediumAnimTime"/>
+</set>
\ No newline at end of file