Shortcut integration with AppSearch (Part 8)

Reduce search space in AppSearch with following changes:
1. Introduce inverted flag upon saving document.
2. Implement AppSearch queries for more general cases.

Bug: 151359749
Test: atest ShortcutManagerTest1 ShortcutManagerTest2
    ShortcutManagerTest3 ShortcutManagerTest4 ShortcutManagerTest5
    ShortcutManagerTest6 ShortcutManagerTest7 ShortcutManagerTest8
    ShortcutManagerTest9 ShortcutManagerTest10 ShortcutManagerTest11
    ShortcutManagerTest12
Test: atest CtsShortcutManagerTestCases
Change-Id: I94ec6a2b04c83ef3689c65d63741340b01c9ff50