Fix duplicated callback events in DonePressedListener (#885)

Signed-off-by: Alex Saveau <saveau.alexandre@gmail.com>

Author: SUPERCILEX

auth/src/main/java/com/firebase/ui/auth/ui/ImeHelper.java

@@ -17,9 +17,15 @@ public static void setImeOnDoneListener(EditText doneEditText,
         doneEditText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
             @Override
             public boolean onEditorAction(TextView view, int actionId, KeyEvent event) {
-                if (event != null
-                        && event.getKeyCode() == KeyEvent.KEYCODE_ENTER
-                        || actionId == EditorInfo.IME_ACTION_DONE) {
+                if (event != null && event.getKeyCode() == KeyEvent.KEYCODE_ENTER) {
+                    if (event.getAction() == KeyEvent.ACTION_UP) {
+                        listener.onDonePressed();
+                    }
+
+                    // We need to return true even if we didn't handle the event to continue
+                    // receiving future callbacks.
+                    return true;
+                } else if (actionId == EditorInfo.IME_ACTION_DONE) {
                     listener.onDonePressed();
                     return true;
                 }