p990: use fs_mgr to mount all the device partitions

Instead of mounting all the device partitions manually from the .rc,
use fs_mgr along with a device specific fstab.

Change-Id: I000c320e4e8ff8dc219860d2357c2b613ca90f13
Signed-off-by: Varun Wadekar <varun.wadekar@gmail.com>
p990: underp automatic time
Dalvik: Get more RAM and faster responses by disabling verify-bytecode

Change-Id: I5c672e10e82ee142a14638a9e2d1179ca6246a5c