Don't assume any ringtone is present on external storage.

If that assumption doesn't hold true, the user will lose his ringtone
and won't know why.

Change-Id: I89409e1351792d020c5458f5104f4bb9f2a040f2
Expand Profiles [1/2]

This commit expands the profiles power menu entry in the to be
- Always hidden
- Hidden only on the lockscreen
- Always show [not applicable to secure lockscreen]

Change-Id: I2e7262abc4043523150e96b330f92c8c042d1d2a
Lockscreen : Fix widgets disabled

Currently, when keyguard widgets are disabled via the DevicePolicyManager,
a default widget if specified via widget_default_package_name/widget_default_class_name
is added on the main screen, and if not successful the default status widget is added.

However in its current state, each cycle of the lockscreen alternates between the two widgets.
Reason is, the default app widget is constantly recycled on screen power cycles, and in such events,
when checkAppWidgetConsistency() fails to add the widget (since the id is no longer valid), it toggles
back to the default status widget, and resets the stored id. Next cycle a new id is allocated and it works
and so on ...

This patchset addresses this issue by not removing the default status widget if not necessary, hence
preserving its id and fixing the toggling issue.

Change-Id: I6b21d18346fed5accc72141097939c92ee9aaa3c