Add native java screen recorder [1/2]

This is based on the screenrecorder binary found in frameworks/av.
It has been converted to a native library with the necessary jni
hooks for interfacing withit via a ScreenRecorder java class.

Volume up + power chord is used to start and stop recording by
binding to the service found in the ScreenRecorder app:
https://github.com/ChameleonOS/android_packages_apps_ScreenRecorder

PS1:
Clean up white space.

Change-Id: I5b7af9b4b4f24a8c54ac0f9dcb36ace16672e2cf

Conflicts:
	core/res/res/values/vendor_strings.xml
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java