camera: reset camera surface on previewstart()

fixes aspect ratio on camera switch bug

JIRA: CYAN-1085

Change-Id: Ic91e0454588a987e72e5336ab9d01bdd249f13e6
Don't mess around with pref local ID for power shutter initialization.

It confuses the pref initialization, causing the back facing camera resolution
being overwritten by the front facing camera resolution.
Instead, make power shutter a global (camera independent) setting.

JIRA:CYAN-752
Change-Id: I5b1c89bcb42ed64feb06a8562ee5e468183f30f0
Add 6mp, 4.5mp, 3.7mp, 2mp, WXGA & WQVGA resolutions

Used in SEMC 2011 devices

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: I691739020eb32a19b7e46165be73dff4952f2c3e
Add a setting for Shutter Speed

Change-Id: Ieebe50a4be04e7fea9301da63c008e36f4ec0dbd

Conflicts:
	res/values/config.xml