Properly delete all GUIObjects and pages on theme reload

Signed-off-by: Vojtech Bocek <vbocek@gmail.com>

Change-Id: I8df41877f8f4439a434becfd47a9914b50649b34
Cache results of GUIObject::isConditionTrue()

Signed-off-by: Vojtech Bocek <vbocek@gmail.com>

Change-Id: Ia50f7c365b2dc0a65ee046bb42972e3594264878
Improve ORS scanning of storage locations

Grab a vector of storage locations and iterate through them for
searching for zips and restore folders.

Change-Id: Ia045b1e15ac3701132d61fe9f5847da5785a9b4e
Merge "Improve ORS scanning of storage locations" into android-4.4
Merge branch 'android-4.4' of https://github.com/omnirom/android_bootable_recovery into android-4.4