Update Android build tools to 25.0.0.

Goes hand in hand with Gradle build tools upgrade.

Best to be on the most recent version.

Author: joshuapinter

examples/Basic/android/app/build.gradle

@@ -84,7 +84,7 @@ def enableProguardInReleaseBuilds = false
 
 android {
     compileSdkVersion 23
-    buildToolsVersion "23.0.1"
+    buildToolsVersion '25.0.0'
 
     defaultConfig {
         applicationId "com.basic"