SystemUI: Add missing sound permissions for screen recording

Change-Id: If948aabfd5c2e09f192f12aa02830d39346d2c6c
[1/4] base: Audio Themes Support

Change-Id: Id80dc7f0bcbd39b5305d6ea0fb8bd9fa516f3634
Merge "SystemUI: Add missing sound permissions for screen recording" into android-4.4
Merge "[1/4] base: Audio Themes Support" into android-4.4
base: tweaks to support force usage of soft keys for devices with capacitive buttons

Two minor tweaks to support that use case.
For devices with capactivive buttons disabling those buttons
need two steps

1) disable buttons backlight - dark mode
2) settings - buttons - custom actions and set all buttons
to "no-action". This fix is needed to get a working home button
and working "long press back to kill" for that setup

PS5
better solution

PS6
cleanup

PS9
whitespace

Change-Id: I563e877580c09df45383e4485c6cbb965aca0b31
[1/2] Base: Disable safe headset volume warning

Settings: https://gerrit.omnirom.org/#/c/5203/

PS7
adjust defaut value

Change-Id: I83e2f180a872ccdec99ef44c4455f6173da340cc
Merge pull request #7 from omnirom/android-4.4

omnirom:android-4.4