Use boost hints on dexopt

Change-Id: I541f83af99fde6b3a34b16dcb4f3870979de90cc

Conflicts:
	services/java/com/android/server/pm/PackageManagerService.java
Add volume steps for better precision

Change-Id: I0bf013ab3fa72457050093abcc755d45c5da9731
Fix: Correct possible null pointer when enabling see through lockscreen

PS2: Remove unused variable

Change-Id: I28884cb18964b273539261b8c0f72cedf2e60666
Fix last signal bar being a pixel to high.

Thanks Adam!

Change-Id: Ic22c91c0f381d64e0f6cbb8dd341e919b9762047