update system properties

enable rgb565 for surfaces by default
enable purgeable assets by default

Change-Id: I9a81eb315e3175dc84cd115a18b6221f1b8404cd
update dalvik properties

Removing dalvik.gc.type-precise tag allows setting dalvik.vm.dexopt-flags
in system.prop. Otherwise value will be overriden with value set in
build/core/main.mk.

v=a, verify all
o=v, optimize verify
m=y, register maps
u=y, optimize for uniprocessor (single core)

Change-Id: I925881ba551660b6f181cf757e6846edde1bb740
set tmp permission needed for adb sideload

Change-Id: I2fb0ec953ef06652ddcb52ccbe51db3879b6847a
Implement libbt-vendor for BTS4025

Change-Id: Ia6c2601951080141de28ce7043697399d33e4c5e