The partition reserved sizes were taking from stock ROM
IE, blockdev --getsize64 /dev/block/mapper/system_a
Also add TARGET_IS_VAB cflag as ro.virtual_ab.enabled is true on stock
so that our commonized tree can enable VAB-specific changes.
Change-Id: I922f61e5a0380d16eba5967f6c77346437290eb6
The ndk_platform backend will soon be deprecated because the ndk backend
can serve the same purpose. This is to eliminate the confusion about
having two variants (ndk and ndk_platform) for the same ndk backend.
Bug: 161456198
Test: m
Merged-In: I14a1c57bd06f1f2aa52491f779c7030d4de03547
Change-Id: I7b9055909b901843631314b9577a9e578a739d00
