build: remove android-apt

Third-party android-apt isn't supported anymore and its features
have been integrated in the Android gradle plugin.

Remove the android-apt and replace with built-in features.

Change-Id: If60e597e961eae5a34baf5dc9142e42e6d106be4
Reviewed-by: Hadrien De Sousa <hadrien.desousa@savoirfairelinux.com>

ring-android/app/build.gradle

 apply plugin: 'com.android.application'
-apply plugin: 'com.neenbedankt.android-apt'
 
 repositories {
     jcenter()
@@ -33,10 +32,10 @@ dependencies {
     // Butterknife
     compile 'com.jakewharton:butterknife:8.1.0'
     compile 'com.skyfishjy.ripplebackground:library:1.0.1'
-    apt 'com.jakewharton:butterknife-compiler:8.1.0'
+    annotationProcessor 'com.jakewharton:butterknife-compiler:8.1.0'
 
     // Dagger dependency injection
-    apt 'com.google.dagger:dagger-compiler:2.7'
+    annotationProcessor 'com.google.dagger:dagger-compiler:2.7'
     compile 'com.google.dagger:dagger:2.7'
     provided 'javax.annotation:jsr250-api:1.0'
 

ring-android/build.gradle

@@ -5,10 +5,6 @@ buildscript {
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:2.3.1'
-        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
-
-        // NOTE: Do not place your application dependencies here; they belong
-        // in the individual module build.gradle files
     }
 }
 allprojects {