Stop AppSearch CTS tests from using its hidden APIs.

Without this change we would not be able to change/remove those APIs in
future mainline updates.

The one removed testcase was testing a hidden builder API which
is only used in Jetpack on older devices and is not used in framework.
The testcase is moved to a unit test in our mts suite.

Bug: 186717514
Test: AppSearchCtsTests
Change-Id: I068b047be1e5fed4f706060066c436a27f19a1f7
3 files changed