QuickSettings: Use plurals for Bluetooth tile

* Some languages need this

Change-Id: I953aee702fcc381dd4bfb3a18fa183341a138ba3
framework: Close system windows when performing 'switch to last app' action

This fixes a bug where performing the action while on the recent apps screen
would cause the next attempt to open recent apps require two presses of the
recent apps button (the first press would toggle it closed, rather than open).

It also prevents the switch from being obscured by the notifications shade.

Change-Id: I2220149ce604a25501121abc29e5d88f8b1cbf4f
core: Add back mistakenly removed string

Change-Id: Ia56f05ebf87f16b9304fe8fa0664874fcc03697c
Automatic translation import

Change-Id: Ie45913a911cf7877a128c3138c347ef31009c91e
Core: Improve AOSP JA translation

They translated "hotspot" as "アクセスポイント"(access point) but it just gets us confused.
"テザリング"(Tethering) is preferred than "アクセスポイント"(access point) in Japanese translation.
FYI, most vendors fixed these strings e.g. Samsung and Sony.

Change-Id: Ic13ec6d33f411b026d90312600d0150bc3a759b0
systemui: Unbreak the planet

 * Not sure who to blame, but it's probably themes... :)

Change-Id: I0c534354a699f756d809aff10843ebea21f3f369