Fix Notification view transformations in RTL

* When views are RTL, transform from the right edge by accounting for view width.
* Also ensure that views tagged with id/align_transform_end_tag actually transform using the right edge in LTR and not RTL.
* Rename TransformState.getViewWidth/Height to getContentWidth/Height because these names were horrendously misleading due to being overridden.

Fixes: 182324842
Test: manual testing in RTL and LTR, and using wide bigLargeIcon on BigPictureStyle.
Change-Id: I8f0615d475a2a20cc2715967c7e31af6c9b2c920