Give backup/restore confirmation a proper window title

Since the confirmation uses the same Activity but different layouts
for the backup vs restore cases, we have to do the title in code.

Along the way, fix the restore layout's padding [the backup layout
was already right].

Fixes bug 5164470

Change-Id: I4d636f666d97fc377e9cf36abf08d1625a05577f
4 files changed