Do not report native memory metrics for instrumentation

If the instrumentation info is not null, that means the process
is running test cases. That isn't a regular use case.

Additionally, if the test case is performing static mocking
(StaticMockMethodAdvice), it may hit concurrent accesses exception.

Bug: 331243037
Flag: EXEMPT TEST_ONLY
Test: Run tests with static mock.
Change-Id: I128c76ce4890189d9d51d544e567e0129403b578