[GPU Service] Implement GPU service.

GPU Service is used to monitor all GPU and graphics driver related features.
This patch implements GPU service into System Server, and implements
functionality to extract the whitelist out of game driver package when the
package is upgraded or removed. This will move the whitelist processing off
critical path when app launches.

BUG: 123290424
Test: Build, flash and boot. Verify by upgrading game driver apk.
Change-Id: I563a138bfe0c4c1bb17ed28dab5d6a8df244021d