SystemUI: Add missing recycle calls (fix lint warning)

Change-Id: Ic3462ceb8d85e4ec2aee833d4327c4b81f5eac5a
NPE in SearchManager.triggerSearch

mAssociatedPackage field is never initialized and cause NPE.

Change-Id: Ibf0d44b2170b7cbfe4a883008254a086e03579c5
Fix for NullPointerException in HTML5VideoViewProxy

There is a missing null check of mHTML5VideoView.

Change-Id: Ic49ad02703717c3b76da4371e80abfdebff90873
Fix to NullPointerException when activity is relaunched

When ChooseTypeAndAccountActivity is relaunched and resumed
by ActivityManager a call is made to onActivityResult without
first triggering onResume. This leads to mAccounts object
still being null.

Fixed by properly setting mAccounts object if it is null prior
to use after function onCreate has been called.

Change-Id: Ife7e1e052c473970d923fa43ee6189eb62a1113b
Allow theming of lockscreen

Change-Id: I10799482e0b393746b4c9818f94862109fac6006