Make "SD Card removed" notification dismissible if the removed SD Card is not the primary storage

Change-Id: I1e3aa0964e7b5652a61d4dd9ed6dde313efd3fd1
Signed-off-by: kecinzer <kecinzer@gmail.com>

Conflicts:
	packages/SystemUI/src/com/android/systemui/usb/StorageNotification.java