Suppress gtest error for tests without any instance

NNAPI VTS is parameterized by discovered devices. When there is no
device available, the compilation caching and memory domain tests will
not be instantiated, and will cause a gtest error. This patch suppresses
the error by GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST macro.

Bug: 168152007
Test: 1.2/1.3 VTS without NNAPI driver
Change-Id: I715ae6f45df66e4a03c12b5d3f38bcc028a9ed7c