Remake kb/button backlight controls as a PowerManager client

PM now has observers for these settings values and applies them in
realtime, so piggyback on those for button light management

Change-Id: I7568069bd6cacf5cbb56c8d0a1746894725b87fa
Add configurable kb/button backlight timeout

Adjust the value for Settings.System.BUTTON_BACKLIGHT_TIMEOUT

Change-Id: Iea534312b09b38a95185d7fc97d922b23faf29e3
Improve button/keyboard backlight code.

- Improve UX
- Deduplicate code

Change-Id: Ie0218de8b83fe49e3fe1d91a64c2522af03ba06d
Check for presence of hardware abstraction framework.

Change-Id: I59da970d4a4eb74a571d1ac27cb18e351dfc2a53
Display Settings: Better font size control

Use a SeekBar instead of a list/spinner to determine the font scaling.
For consistency, an approximate size (small, normal, etc.)
 and the exact percentage are displayed.

Change-Id: I96f80d93e740a25a6a6890b423a41c3900b93767
Settings: HU translation

PS2: Correcting
PS3: Correcting
PS4: Correcting
PS5: Correcting

Change-Id: I5f6b29fe470c6d3da7bdd077f1c8fa13df730ccb
Merge "Remake kb/button backlight controls as a PowerManager client" into cm-10.2
Merge "Add configurable kb/button backlight timeout" into cm-10.2
Merge "Improve button/keyboard backlight code." into cm-10.2
Merge "Display Settings: Better font size control" into cm-10.2
Settings: FI translations

Change-Id: I21e05da0a71cd15c6e7dda26a2edc9c814c8822e
Settings: SK translations

Change-Id: Iacf11e099ee385e48ccaabb05b5fc5084822bc9a
Settings: EL translations

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: Ic0c443deb2f7124eb3190e26161ca094708850b7
Settings: PT-BR update translations

Change-Id: I709c3e5c9ae8975add5a911f6c280dbcbd0494dd
Settings: Remove redundant translations

Change-Id: Ia2e4b1efed6f0e8421d4e755b6a740fb4e69ae2f
Save value to shared prefs in HW value scale.

Otherwise we can run into precision issues if the HW e.g. uses a 0..255
scale.

Change-Id: I2df81db728faa64ee7b09cc3101122ff5c95b7a3
Merge "Settings: HU translation" into cm-10.2
Merge "Settings: FI translations" into cm-10.2
Settings: DE translations

Change-Id: Ib80372e0aaf89b1cde9bc7061bff15a377e9acd6
Merge "Settings: PT-BR update translations" into cm-10.2