Check for encrypted backup

app/src/main/java/eu/faircode/email/FairEmailBackupAgent.java

@@ -56,9 +56,12 @@ public class FairEmailBackupAgent extends BackupAgent {
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
         boolean enabled = prefs.getBoolean("google_backup", BuildConfig.PLAY_STORE_RELEASE);
 
-        EntityLog.log(this, "Backup start enabled=" + enabled);
+        boolean encrypted = ((data.getTransportFlags() & FLAG_CLIENT_SIDE_ENCRYPTION_ENABLED) != 0);
+        boolean d2d = ((data.getTransportFlags() & FLAG_DEVICE_TO_DEVICE_TRANSFER) != 0);
+        EntityLog.log(this, "Backup start enabled=" + enabled +
+                " encrypted=" + encrypted + " d2d=" + d2d);
 
-        if (!enabled)
+        if (!enabled || !(encrypted || BuildConfig.DEBUG))
             return;
 
         try {
@@ -130,6 +133,11 @@ public class FairEmailBackupAgent extends BackupAgent {
         EntityLog.log(this, "Backup end");
     }
 
+    @Override
+    public void onQuotaExceeded(long backupDataBytes, long quotaBytes) {
+        Log.e("Backup quota exceeded " + backupDataBytes + "/" + quotaBytes);
+    }
+
     @Override
     public void onRestore(BackupDataInput data, int appVersionCode, ParcelFileDescriptor newState) throws
             IOException {
@@ -215,6 +223,11 @@ public class FairEmailBackupAgent extends BackupAgent {
         EntityLog.log(this, "Restore end");
     }
 
+    @Override
+    public void onRestoreFinished() {
+        EntityLog.log(this, "Restore finished");
+    }
+
     static void dataChanged(Context context) {
         try {
             new BackupManager(context).dataChanged();