Make menues and dialogs 90% transparent

Drawables by - Tun_SD (Daniel Seidel)

PS2: Add xhdpi normal and DarkUI ones

Change-Id: Ida77cee2c788505437e06262dc3ae9cbbc6cbe4d
Reduce warning verbosity in aapt

- Attributed source of problems to the correct file.
- Only verify string localizations against valid
  locales.
Bug:13140015
Change-Id: I9dabc5efa0510649caee8af0c8ebb803d6f48269