Add external_sd and efs to /etc/fstab generated by recovery

Patchset 1) initial patch
Patchset 2) drop efs mount

Change-Id: I6330550061a55379280ada9d315f9b13c1ee2535
minadbd: remove unnecessary header files.

Change-Id: Iff2b53d9e63b279d0262cd2e9cfb11e0ca4d6b42