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: 11230254
Change-Id: Ife99df42bc145fbd2d5c3128330bc0f88b104de9

This is the central change of multilingual input.

Bug: 11230254
Change-Id: Id8b68fb101e837e8cf182ab4bc1e55e4da5cc49d

This class is separated from AndroidSpellCheckerService

Bug: 16547557

Change-Id: I3e58521207395588cecb2977234b89067d6da8c3