App sidebar: some adjustments

- Cleanup
- fix disappearing appbar on changing appbar position
- may fix endless FC on changing appbar contents

Change-Id: I7667e60878c07b7c722dbd2bd5c2fd69bbbdda78
SystemUI: Cleanup and enhance notification drawer header

- Crop properly images on tablets and landscale
- Use a separate layer instead of breaking header background
- Fix bug where you couldn't turn header back on after turning it off
- Added a gradient overlay

Change-Id: Ife399b82a3f272fb2ecc8e738c5f274f7682a556
Camera button support [1/2]

Original commit - https://github.com/CyanogenMod/android_frameworks_base/commit/e0749499766be45165b912d0c6400f4c69982fe4

Credit/Thanks to @NeverGone-RU

Change-Id: I2de3036d98807d35ea99c2bddbafc2f5dc2cd9aa
Merge "SystemUI: Cleanup and enhance notification drawer header" into du44
Merge "Camera button support [1/2]" into du44
Fix bug with non-secure gesture lockscreen

Change-Id: I8d5f2be117f0609adeb1b8a3705bd9d3be5dc137
Remove duplicate alarm sounds

Change-Id: I5ac8808b00adaaefafd39fca297cb4c4141eb027
Remove Alarm_Classic from AllAudio.mk

Change-Id: I6c9b35f8fb527db7741588e9e55c64c64748d040
Make slimrecents background dark

Change-Id: I8a1257141df274948f6b381b2abf6157dd54373b