1. When magnifier, if a dialog that popped up is wider than the scree we pan to its upper
left corner. We now show the upper right corner if the locale direction is RTL.
2. Keyguard dialogs are not centered since they are used as a sign to recompute the
magnified area but an unnecessary else statement prevents such dialogs from being
properly show via a pan.
bug:7374331
Change-Id: I285e46b822a29f0082c502cb642f9da32dabfe6a
444e8aabc1