Disable build caching

This sometimes messes my gradle cache really badly, as in:
- Clean builds will finish within 1 minute
- Any code changes I do will be ignored
- There's no real indicator whether this just happened, apart from clean
  builds being unreasonably fast

Change-Id: I4559368d3c12f2700827022a5266a451bd97dc6b

gradle.properties

@@ -12,7 +12,7 @@ org.gradle.jvmargs=-Xmx4g -Xms512M -XX:MaxPermSize=2048m -XX:MaxMetaspaceSize=1g
 org.gradle.configureondemand=true
 org.gradle.parallel=true
 org.gradle.vfs.watch=true
-org.gradle.caching=true
+#org.gradle.caching=true
 
 # Android Settings
 android.enableJetifier=true