ANDROID: Add OWNERS files referring to the respective android-mainline OWNERS

This was generated with
  $ build/synchronize_owners common-mainline/ android-mainline common-4.19-stable

Bug: 184248201
Signed-off-by: Matthias Maennich <maennich@google.com>
Change-Id: I5e56eb34fcbb5a2a013dd03bc9dcc4f159fb90de