Camera2: Improve qcom strings

* Set more strings untranslatable
* Rephrase some dialogs
* Use consistent string style with the rest of the system
* Change some unnecessary uppercase strings

Change-Id: I6b5fcd0c79214138751fcb486ebc0a3a90383bab
Merge "Camera2: Improve qcom strings" into cm-11.0
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_packages_apps_Camera2 into cd-4.4