[3/3]Settings: add "Accept all files" option for incoming files via Bluetooth

  Vanilla Android requires the incoming file from Bluetooth to be certain mime-types.
  The mime-types allowed are defined in
packages/apps/Bluetooth/src/com/android/bluetooth/opp/Constants.java
  But sometimes we need to accept files that is not in the list,such as RAR archives
or APK packages.
  This patch makes "Accept all files" an option in Settings -> Bluetooth -> (Menu),
and then saves users' choice to Settings Provider database.
  This will meet users' demand as well as keep the phone from unsafe files
when users don't need to accept the files out of the mime-type whitelist.

Change-Id: I5f04d3ccb45bd5c6525b746855bd19ccc8501d32

Conflicts:

	res/values/cm_strings.xml
Settings: correct y-axis brightness in preview

To answer the comment in the code, no, the min brightness should not
correspond 0, but rather to the device min supported level. The values
on the preview graph should correspond exactly to the percent values
entered in the brightness configuration dialog.

Change-Id: I4a6d19b261f33f53d24437cde99e63e03ba3fc28
settings: Cleanup and add auto power profiles option

 * Add categories for all items
 * Add helper class for Settings.Secure

Change-Id: I9d8fd6720516e7fa321c05744ada81415cbf8aaa

Conflicts:

	res/xml/performance_settings.xml
Settings: move 'Take bug report' from Dev to About

Change-Id: I52b9b2bc13998cec6f85a1b85458f36c9f461490
Signed-off-by: Roman Birg <roman@cyngn.com>

Conflicts:

	res/xml/development_prefs.xml
Settings: remove lockscreen wallpaper picker from Lockscreen Interface

It should be accessed through the Themes interface.

Change-Id: Ibd893c82d4f1caf1c696474a17b5fceecc4ea1ab
Signed-off-by: Roman Birg <roman@cyngn.com>

Conflicts:

	res/xml/lockscreen_interface_settings.xml
Revert "Settings: move 'Take bug report' from Dev to About"

This reverts commit b9689d6ccf757a54a822868c41dc3fe1ffd92f64.