Improve resolver layout in case package name is shown.

Change-Id: Ib2bd0c19727194205b6e4114c34bf96663030d5f
hwui: Don't discard framebuffer on exynos4

The layers gets empty/not cleaned and redrawn on top of the preview,
causing beautiful glitch on homescreen, and drawing black instead
of transparency.

Change-Id: I633b104224c73c625f1193ee3dde41823cddc5bf
Add support for Samsung extended AGPS

The AGPS implementation in the GPS chipset used in some Samsung devices
(i9100, i9300) can make use of the Psc field. Adapt the relevant
functions hiding the changes incompatible with other devices under the
AGPS_USE_PSC #define.

Credit to Qaweck from xda-developers forum for finding the meaning
of the field.

Change-Id: Ie4691c79ca379a1f5c0a87500c1b06b56ae7ac0d
Merge changes Ie4691c79,I633b1042,Ib2bd0c19 into jellybean-mr2.1

* changes:
  Add support for Samsung extended AGPS
  hwui: Don't discard framebuffer on exynos4
  Improve resolver layout in case package name is shown.