fix this mess

camMode and ZSL are persistent across camera switches and switches from
still video to camcorder, resulting in inconsistent states.

The fix:
Don't just detect if camMode is unset, since the previous set state is
too persistent. Instead, test specifically for the special mode Snapchat
sets that the wrapper would never set, where the recording hint is not
on but camMode is.

Ensure we are only enforcing the Hangouts exception for the FFC.

Restore the previous ZSL logic. It worked just fine.

Change-Id: I0751c12ebd4035a86682e9c9c76b7e2d422cbc7e
Various camera fixes

Sometimes camMode is left on when switching from video to still mode.
Detect the switch and allow it to be reset.

Do not set camMode on rear camera (yet).

preview fixes for ApexQ

Change-Id: I1ff0153ccb402e0e67e1660210829f07a90dee7a
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_device_samsung_msm8960-common into android-4.4