Add error checking and tests for jni_uses_sdk_apis and jni_uses_platform_apis

Check that jni_uses_sdk_apis and jni_uses_platform_apis are consistent
with sdk_version, and add tests that they select the right variant.

Bug: 154665579
Test: app_test.go
Change-Id: I544a4f881ba16dacd7e74cd480c095091b3cf667