Pinch to Rotate and Scale on Android

[ygbr]

Like the module already does for iOS, it would be nice to have 2-finger (pinch) scale and rotation of the target views both for Android too in order to keep parity.

There is an Android native library that does this perfectly already: https://github.com/Almeros/android-gesture-detectors

There should be two boolean parameters for this: canResize and canRotate

@iotashan already mapped the pinch events on Android on his last commit, we just need to scale / rotate the target views on Android and also keep the rotating / scaling from on iOS. Follows the commit link:

iotashan@fe2e4f7