Exclude current app & input categories frm customization

We do not yet support shortcut customization for these categories

Fix: 377889079
Test: manual, on shortcut helper UI, enter customize mode, check that
Input category and current app category are not in customize mode.
Flag: com.android.systemui.keyboard_shortcut_helper_shortcut_customizer

Change-Id: I5cf75fa69353b2158948b279785e8076022810e8