[1/2] Improve flash availability check.

* Use simple overlay, default false.

PS2: Add header and proper symbol.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>
Change-Id: I40458959d738fbd82941a19ff1ffcfa236bffcb9

Conflicts:
	core/java/android/provider/Settings.java
	core/res/res/values/pa_symbols.xml
QS: RSSITile: Finally fix the data indicator

The X for data off now changes based on the mobile data enabled setting.
If mobile data is enabled, the rssi tile behaves like stock.
If mobile data is disabled, the X shows to indicate that the user disabled data.

PS1: Inital commit
PS2: Nothin to see here...
PS3: Remove uneccesary wifi check.
     The overlay should be nulled any time the other conditions aren't met
PS4: Remove unused import

Change-Id: I76e63c606f2651a8463f9cd0b3665543b420d72c
Signed-off-by: Evan Anderson <evan1124@gmail.com>
Quicksettings: Rework behavior on edit mode for temporary tiles.

* Animation:
  - Make them disappear when edit mode is enabled.
  - Put them back when edit mode is disabled.
* Fix broken touch listeners after toggling edit mode after boot.
  Adressing JIRA AOSPA-4 issue.

PS2: Simplify logic and code.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>
Change-Id: I4da623ec5fffad4ddf414c70a18f3ee547d83fc5