We no longer use most of the BrowserID Java code outside of tests. The little bit we do use generates cryptographically strong keys (see mobile/android/services/src/main/java/org/mozilla/gecko/browserid/BrowserIDKeyPair.java and its implementing concrete classes) and could be seperated from the code around verifying. What tests we do have don't run in automation (and are probably broken) since they hit "live" endpoints. Let's clean this up, simplify the code base, and save some APK space.