ANDROID: Update the ABI symbol list and stg

Adding the following symbols:
  - vm_unmapped_area

ABI differences:

1 function symbol(s) added
  'unsigned long vm_unmapped_area(struct vm_unmapped_area_info*)'

Bug: 344489121
Change-Id: I1798b662e81283e1f8e8f2091e5e4b6d2d4fe2c0
Signed-off-by: Vamsidhar reddy Gaddam <gvamsi@google.com>
Signed-off-by: Will McVicker <willmcvicker@google.com>