[DO NOT MERGE] Check bounds in offsetToPtr
Check whether specified offset belongs to mData.
Also added a default argument bufferSize to check the end offset.
Size of the ashmem descriptor can be modified between
ashmem_get_size_region call and mmap. createFromParcel method was updated
to check ashmem size again immediately after memory is mapped.
Test: manual - using the test app from the bug
Bug:
34128677
Change-Id: I3ecd1616a870ce20941ce9b20a1843d2b4295750
(cherry picked from commit
45e2e95c2ffeb2d978e2cce80b729ef6ada3b8d2)