[GPU Service] Separate GPU Service out of SurfaceFlinger.

Historically GPU service lives in SurfaceFlinger because it's a convenient
hack. This patch separates GPU service out of SurfaceFlinger. The GPU service
is a service that accesses to GPU, queries GPU capabilities and reports back.

Minor: Replace Vector with std::vector.

BUG: 118347356
Test: Build, flash and boot, `adb shell cmd gpuservice vkjson` to verify
Change-Id: If8feedc0a58bcd3c2e4111f8997117a618f5a516
Merged-In: If8feedc0a58bcd3c2e4111f8997117a618f5a516