Define paths for recovery settings files in a separate header

Also, use get_primary_storage_path() to define the locations of .no_confirm,
.many_confirm, and .hidenandroidprogress instead of hard-coding /sdcard/.

Change-Id: I50442a226af1d102786c833c0b53c25bf63c67a6
(cherry picked from commit bd0fe453f6ca242f0ed868b4c0934af29d499bba)
Merge "Define paths for recovery settings files in a separate header" into cm-11.0
Merge remote-tracking branch 'cm/cm-11.0' into cm-11.0