Merge branch 4.4.3_r1.1

Change-Id: Ie59d786469cdef63bc499bad8af049862b5228f1
Generate extra userdata partition if needed

* To support variants of devices which may come in 16/32/64GB variants.

Change-Id: I74c32d8316f0450a1445fe95a95e5cabb7a9dd1b