Reduced warnings by removing unused imports, unused variables and adding type arguments

Change-Id: I551403a94de87a2fdf24ac0175ce69b4c8a48d54
remove DebugBridge as it has been replaced with AdbBackend

Change-Id: I52270f2d4ee137932a32309812a8a20503839035
Add in the help command implementation to return the "help" string to the caller.

Change-Id: Icb350e4c1cb5ce219ea5ae90272dd7bbaba283e3
Merge "Add in the help command implementation to return the "help" string to the caller."
Add in stub backend to be used for jython unit tests.

Change-Id: Idb7a18ce1ddeb8621c688d5580515d10db6edf19
Merge "Add in stub backend to be used for jython unit tests."
am 26dc3612: Sim fixes.
add frameworks/base/vcard/java to fix eclipse

Change-Id: I087266f22d8e95bc6d088e07d1da7dc62e32c1eb
Merge commit 'bed675c09dbb16770039ec432061a11d7bea2119' into HEAD

* commit 'bed675c09dbb16770039ec432061a11d7bea2119':
  Reduced warnings by removing unused imports, unused variables and adding type arguments
Merge commit 'eae3b0df7044b0fa28162f26485a37cc21a48c96' into HEAD

* commit 'eae3b0df7044b0fa28162f26485a37cc21a48c96':
  add frameworks/base/vcard/java to fix eclipse
  Add in stub backend to be used for jython unit tests.
  Add in the help command implementation to return the "help" string to the caller.
  remove DebugBridge as it has been replaced with AdbBackend

Conflicts:
	ide/eclipse/.classpath
Update to use system/core/include 4.2.2_r1.2
Update to use sdk 4.2.2_r1.2
Update to use binary.mk 4.3_r2.1
Update to use update-api
Remove pdk

doesn't exist since 4.1.1