Camera2: LT translations

Minor fixes, additional strings have been translated
PS2: removed some translatable="false" strings, improved translations
Change-Id: I360bf876f0d3470a9bb7540540daa56cd9838e7a
Camera2: RU translation (fix minor typo)

Change-Id: Ib5e92a235d7d8956730d7e0bb6d1f4825a622da3