Settings: Alert user when they attempt to add an invalid number to BL.

  - BlacklistProvider will reject numbers that aren't valid, silently. So instead of
  resuming to a blank screen, we should alert the user that the number they attempted to
  add is invalid by utilizing BlacklistUtils#addOrUpdate method.

Change-Id: I1ca32427baad41c1c9379e18046e6ca7937b6d32
(cherry picked from commit 49b44e03538c581e40574690c07ae0c2067c8f75)
settings: prevent NPE if device doesn't support ActionBar

If the device FEATURE_ACTION_BAR (the device hasn't it enabled or a theme has disabled it), getActionBar()
will return a null reference. Just prevent to use that invalid ref.

JIRA: BUGDUMP-23210
https://jira.cyanogenmod.org/browse/BUGDUMP-23210
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>

Change-Id: I210867b10193471c49e444c27c47e9de6baee822
(cherry picked from commit 7f7f694d18f05c86953be4b0a3fb565bce81a859)
Use actual storage type of sdcard/usb (2/2).

Currently, storage volume description for mount/unmount/format determined at
build time using PRODUCT_CHARACTERISTICS. For device which has only a sdcard or
only support usb storage, displayed description is correct. For device which has
both storage, the displayed description is totally wrong.

Use of actual storage type at runtime can eliminate the needed to specify
product characteristics, either default or nosdcard.

Change-Id: I9f8d53a4648d960f1009b1fe94787eecd4343427
(cherry picked from commit 2fbe045206150a721a22c871e2b9036ee2c08751)