Development shortcut in StatusBar and Recent Panel

It enables the wipe data and application force close option in the
recent tasks list and in the notification area. These options will
be available only if the Development shortcut option is enabled.

Change-Id: Ia4e1d040e8eade5afe118dd62bc28c86381c03e6
Base: Lockscreen blur [1/2]

Show the content behind lockscreen, blurred.

Settings: https://gerrit.omnirom.org/#/c/4702/

Change-Id: I0d7ee20d6b415567f0051d716ba0db2e55511e91
Fix QuickPulldown always opens QS on first pull-down of StatusBar

Change-Id: I2af5d26f137f8d880ed5789d337a7fac8fa144e1
Also hide "emergency only" label if signal bars are hidden by option

Change-Id: Iad3f93bad0b4dc920dcd558ad236460111b6a8c9
Floating window with multitasking

basic floating window are taken from AOSPA (HALO) by @D4rKn3sSyS

Drawables courtesy of @Alex Cruz thanks to him :)

with heavy change to get this work for multitasking

this feature, has ability to:
1. Moveable window to various position
2. Scaling window with 2 finger like zoom in/out
3. Double tap in actionbar or above window to fullscreen or back to floating window
4. Automatically resize when Snapping into one of side (Top, Bottom, Left, Right)
   (taken from xhalofloatingwindow by @zst123)
5. Automatically switch focus from other app (taken from multiwindow by @xplodwild)
6. Unlimited floating window app (depends on RAM)

this is still under testing, to make fully works
so if there any bug because of this, DO NOT REPORT INTO OMNIROM JIRA

to make app launch using Floating window feature

you must add Intent.FLAG_FLOATING_WINDOW
before start an activity

for example you can look at https://gerrit.omnirom.org/6515

need https://gerrit.omnirom.org/#/c/6561

PS.17 : fix scaling
PS.18 : fix layout calculation when rotate
PS.19 : support minimize/maximize window (see App circle sidebar)
PS.20 : fix previouse app

Change-Id: Iad00c239de7d66e8bb45205ce626d4f08417b7cd