Revert "dvm: Bring back the ANDROID_DATA override"

This reverts commit e3410fde916567e145c3ad5d07b581da0b80d9bc.
Revert "DexOpt anything in /system on /cache"

This reverts commit 8fce8bae53078302e6385c5e609e2179aae2c77f.
JIT: Allow use of cbz/cbnz for conditional branch gen.

Optimize conditional branch generation when comparing
with zero for ARM JIT. When possible use cbz/cbnz
instead of cmp+beq/cmp+bne.

This improves performance for usecases involving
code execution in Dalvik.

Change-Id: I8f7c44c87eb73d4da00a48fd86220a62cb0515f5
Signed-off-by: Patrik Ryd <patrik.ryd@stericsson.com>