Screen recorder settings [2/2]

* Possibility to save preferences regarding pointer
* Possibility to use microphone as audio input

Change-Id: I2d99e6d33c9fd60ec07d265001218590d89bab5e

Conflicts:

	core/java/android/provider/Settings.java
	packages/SystemUI/AndroidManifest.xml
Screenrecord: save screenrecord in "Screenrecords" directory

previously it was saved in "Screenshots"
also refactor source a bit, remove warnings

Change-Id: Idf9b024bbbf1816aa91e5e455525750a761ddb73