Bug: 20035793
Change-Id: Idc13af405eab5457954a93db3dddcd81f6eb6435

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

1. Add retry count column within metadata in dictionary pack.
2. Attempt a retry for download and installation by running StartDownloadAction.
3. If the number retrial are at the threshold, we don't attempt it again.

Bug: 15150487
Change-Id: I70720353e5803fccf4728c2aa798883ba75c61e5

Change-Id: If16ef50ae73147594615d0f49d6a22621eaf1aef

Bug: 13125743
Change-Id: I082aa9df1dd4a10cdb3f97ee0692f2d72f6c8e7e

Some were never closed, other closed twice. This change
makes all Cursor instances behave, having the #close()
call in a finally{} clause, and puts the burden of closing
the cursor squarely on the creator rather than in the
called methods.
There is however one exception that is beyond the scope
of this change: UserDictionarySettings have a Cursor
member, it's never closed, and fixing the problem is not
obvious. This change adds a TODO for now.

It's not very clear if this change actually helps with
bug#12670151, but it may be related and it's a good
think to do anyway.

Bug: 12670151
Change-Id: I87cc44387e7dee3da1488671b93a28d9d73f7dc0

Bug: 8161354
Change-Id: I17c23f56dd3bc2f27726556bf2c5a9d5520bd172