QuickSettings : Register/unregister cast tile one time

Don't do these operations every time the parent is visible/invisible,
it causes jank.

Repro:

Turn on wifi on a network w/ chromecast
Swipe down quick settings panel really fast

Change-Id: I3dfcd3610abe96e1bfdab06ef3b876ccf5140ceb
SystemUI: PL Translation

Credit goes to @xenu for this.

Change-Id: If7d3b12a5895c2527a1d2fb1385a3085427a47ce
SystemUI FR Translation: fix some translations.

Change-Id: Ifafa20431e996723202c94a35b6661972c7ffe66
Core FR Translation: fix some translations.

Removed some English words. French is better.

Change-Id: I3ee22806473de779f978a4d258612efe1f0a8ac3
Merge "QuickSettings : Register/unregister cast tile one time" into kk4.4
Merge "Core FR Translation: fix some translations." into kk4.4
Merge "SystemUI FR Translation: fix some translations." into kk4.4
Core PL Translations

Change-Id: I05396c3d71455e7dd1e2340e4a1a4581801f2399
FB: Volume panel background color && transparency [2/2]

Allow user to specify background color and transparency level
    for volume panel.

PS: color now applies instantaneously after setting the preference.
Change-Id: I23a09d302fe090fe4aed6dd9024c73056d14fba1
Merge remote-tracking branch 'upstream/kk4.4' into kk4.4-mo4