Merge pull request #2444 from twisstosin/dev-v2

Updated Gradle, Compile and Build Tools Version

build.gradle

@@ -19,7 +19,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.1'
+        classpath 'com.android.tools.build:gradle:2.2.3'
         classpath 'com.novoda:bintray-release:0.3.4'
     }
 }
@@ -29,9 +29,9 @@ allprojects {
         jcenter()
     }
     project.ext {
-        compileSdkVersion=24
-        targetSdkVersion=24
-        buildToolsVersion='23.0.3'
+        compileSdkVersion=25
+        targetSdkVersion=25
+        buildToolsVersion='25'
         releaseRepoName = 'exoplayer'
         releaseUserOrg = 'google'
         releaseGroupId = 'com.google.android.exoplayer'