Camera2: Tweak some strings

Taken from CameraNext resources

Change-Id: I5d3cd7f7ca0f08be39ba571826db3bae8019b333
Camera2: Fix default slow shutter option

Broken after http://review.cyanogenmod.org/63070

Change-Id: I611c1bd812ab1151fd91f3c758c0e3c357e3454f
Camera2: Use consistent translations for megapixels

Change-Id: If12826cd6a4c11f4b5ccdcd2d7a8166914276da8

Conflicts:
	res/values-af/cm_caf.xml
	res/values-af/cm_strings.xml
	res/values-ar/cm_caf.xml
	res/values-ar/cm_strings.xml
	res/values-ca/cm_caf.xml
	res/values-ca/cm_strings.xml
	res/values-cs/cm_caf.xml
	res/values-cs/cm_strings.xml
	res/values-da/cm_caf.xml
	res/values-da/cm_strings.xml
	res/values-fi/cm_caf.xml
	res/values-fi/cm_strings.xml
	res/values-fr/cm_strings.xml
	res/values-hu/cm_strings.xml
	res/values-it/cm_caf.xml
	res/values-it/cm_strings.xml
	res/values-iw/cm_caf.xml
	res/values-iw/cm_strings.xml
	res/values-pl/cm_strings.xml
	res/values-pt-rBR/cm_caf.xml
	res/values-pt-rBR/cm_strings.xml
	res/values-pt-rPT/cm_strings.xml
	res/values-sk/cm_caf.xml
	res/values-sk/cm_strings.xml
	res/values-sr/cm_caf.xml
	res/values-sr/cm_strings.xml
	res/values-sv/cm_caf.xml
	res/values-sv/cm_strings.xml
	res/values-tr/cm_strings.xml
	res/values-zh-rCN/cm_caf.xml
	res/values-zh-rCN/cm_strings.xml