Update app/build.gradle

Sets up the debug and release buildType.

app/build.gradle

@@ -62,7 +62,16 @@ android {
     }
 
     buildTypes {
+        debug {
+            debuggable true
+            versionNameSuffix '-DEBUG'
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+            signingConfig signingConfigs.debug
+        }
+
         release {
+            debuggable false
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
             signingConfig signingConfigs.release
@@ -84,11 +93,15 @@ android {
         //avoiding okio error: https://github.com/square/okhttp/issues/896
         lintConfig file("lint.xml")
     }
-    
+
     sourceSets {
         debug {
             manifest.srcFile 'src/debug/AndroidManifest.xml'
         }
+
+        release {
+            manifest.srcFile 'src/release/AndroidManifest.xml'
+        }
     }
 }