frameworks/base/wifi/tests: Run mts-wifi on AOSP builds

This is a temporary workaround for mts-wifi to
run on AOSP builds, since on those devices the
Wifi package name is `com.android.wifi` and not
`com.google.android.wifi`.

Bug: 151836001
Test: continuous runs
Change-Id: I11baae67e10638acd8c24ae0fab92e5b2bfca6e4