Settings: Fix isPackageInstalled logic.

    - If package is null, isPackageInstalled returned true.
    - Return false if null, always.
    - PS2: Fix codestyle
Change-Id: If2bf41e4c9520195d56e327a447d7085daab3154
Revert "Halo: allow choose notifications on floating window or not (2/2)"

This reverts commit fc20fd5b0280464df11381be8f6c66a3e186e0df.
Apps: Add blacklist interface [2/2]
Now with 100% more hidden checkboxes

@cristianomatos: Include Halo in new blacklist button and some code adjustment and clean-up related

Change-Id: I8894e00a81ed84583b7bf0be8795c25c857161af
Signed-off-by: Evan Anderson <evan@thelinuxman.us>

Conflicts:
	res/values/cr_strings.xml
	src/com/android/settings/applications/InstalledAppDetails.java