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

Bug: 17668298
Bug: 8651816
Bug: 17709442
Change-Id: Ib232f9d95d7c01a028be85d10f974a5a570c0ed5

Change-Id: I7290cd1fb675a1b85b9b6ac2d464c932b5bca1dd

Bug: 9715797
Change-Id: I1eda4d2f0056f70cfb8a92d658e0875706efc170

Bug: 9550800
Change-Id: I087205530a5dbcff4bf08f48f4aa7068aae93215

This patch does two things:
- If there is no URL to download new data from, then the
Refresh button is not shown.
- Even if for some reason refresh starts for a client for
which there is no URL, loading correctly finishes.

Bug: 9388602
Change-Id: I3fd9214da50faa4b59d0bd3e775293dd34f07547

This is to avoid confusion if multiple IMEs are installed with
dictionary pack components

Change-Id: Ibc91951e4fdd5db13f681e4cb06197da98527bbc

Bug: 7600384
Change-Id: Ic5dbbbbcf19d778dde1316ebb417f1a8ede2d25d

Bug: 8161354
Change-Id: I17c23f56dd3bc2f27726556bf2c5a9d5520bd172