Revert "Implement getDocuments() support in AppSearchImpl."

Revert "Add CTS tests for AppSearch.getDocuments APIs."

Revert submission 10081469-060-get-impl

Reason for revert: Breaks build due to collision with ag/10111175
Reverted Changes:
I013ac2f01: Implement getDocuments() support in AppSearchImpl....
Ia518a91fe: Add CTS tests for AppSearch.getDocuments APIs.

Change-Id: Ib6437eb41c53f7bf00aac7951b427455982f2247
4 files changed