This CL fixes the following compiler warnings.

- Indirect access to static member
- Access to a non-accessible member of an enclosing type
- Parameter assignment
- Method can be static
- Local variable declaration hides another field or variable
- Value of local variable is not used
- Unused import
- Unused private member
- Unnecessary 'else' statement
- Unnecessary declaration of throw exception
- Redundant type arguments
- Missing '@Override' annotation
- Unused '@SuppressWarning' annotations

Bug: 18003991
Change-Id: Icfebe753e53a2cc621848f769d6a3d7ce501ebc7

Change-Id: If16ef50ae73147594615d0f49d6a22621eaf1aef

This also abstracts away the "package deactivated" case for
simpler and safer code.

Bug: 11072561
Change-Id: Idaaf2ae8d8d5b2c4a15de641bbf2f8c5c7cc9410

Change-Id: I5cfa0d2fccc139bd6c45c5590a68c3e0c90534b8

Bug: 7600384
Change-Id: I33ea155c0c97c7ead07686c4d2a9e0d98be9929c

Bug: 7600384
Change-Id: Iaa8f3a59243a15d2a01aaf6017ed85c52b6482a6

This ensures the thread does not run uselessly (it is even terminated when
the progress bar exits the screen).

Bug: 7600384
Change-Id: I09117a6f763b574b9b3266f36ba3da4720dc9224

Bug: 7600384
Change-Id: I55b51152dd9968a359af091bf309f0d406f63ec4

Bug: 8651863
Change-Id: I748f35726d72ede926d5b06ed87ff029317f1ac3

Bug: 7600384
Change-Id: Ic5dbbbbcf19d778dde1316ebb417f1a8ede2d25d

Bug: 8161354
Change-Id: I17c23f56dd3bc2f27726556bf2c5a9d5520bd172