"Clear all" button on recent apps

    Ported from ParanoidAndroid by zigackly:
    https://github.com/ParanoidAndroid/android_frameworks_base/commit/f8c44e6ef667a3ebe9b658f148fa78a8d4f9a8dd

    Add button to tablet layout ported from Codename Android by zigackly:
    https://github.com/CNA/android_frameworks_base/commit/8d259fe3588c261baa5a17c361255cf28cc82bfe

    Patch set 2: Make the layout consistent, with the button at the top right.

    Patch set 3: Remove the redundant use of removeTask()

    Patch set 4: Top right layout does not work in tablet mode: make it top left for tablets only.

    Patch set 5: Different implementation (No need to keep track of views) - Danesh M

    Patch set 6: Top left layout no longer works for tablet mode with new implementation.
                 Make it bottom left for tablets only.
Configurable 0, 90, 180 and 270 degree rotation

Change-Id: Ia1859c51d71ef9d01cec2d13c6468ed89c6ac53e
Contributor: jonasl
Do not set the network mode differently for LTE+CDMA

ro.telephony.default_network can be set if needed to set a different
value for LTE+CDMA. No need to hardcode preferred network mode in the source code.

Change-Id: Iae65f72a6a3bc31d500c5ecec87368a6f2a5d117

Conflicts:

	packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
@hide API change from themes

Change-Id: Ia0798346d2e8e5a84e8456bb89b7d503a71a7afa