Only send feedback for ExternalAccountType if not from tests

Some tests have expected failures and we're currently always sending
feedback for them.
injectedMetadata will only be non-null if the constructor is called
from test code.

Test: added a debug statement within the condition and ran the tests
verifying no feedback was sent from the tests.

Bug: 32636761
Bug: 32635377
Change-Id: I6661e411a5b34daff777b05626d9192181082823