Update Query_StrIndex3 test
Update Query_StrIndex3 test

This test takes 20 min to execute on AndroidArmeAbiRelease. These
modifications will probably reduce the time to ~1 min.

Change-Id: I5360429ae375aad3e1ae5788897a46e86e78c892

realm/realm-core,realm/realm-core,realm/realm-core,realm/realm-core,realm/realm-core,realm/realm-core,realm/realm-core