Initialize mAddExtraTestVendorConfigs to false.

If we do not init, the initial value is undefined.

Test: Local run
Bug: 340947823
Flag: EXEMPT bugfix
Change-Id: I18a3688a446dd969545e1fc2cb5f63210c3c02cd
Merged-In: I18a3688a446dd969545e1fc2cb5f63210c3c02cd
1 file changed