Close clipboard text editor when text is copied

If the user copies text from the text editor itself, we should
close the editor (and just open the clipboard UI) since it no
longer represents the contents of the clipboard.

Bug: 225361313
Fix: 225361313
Test: manual
Change-Id: Ie71e80d101c131d803c2eb2dafb622e116ddbeb3

packages/SystemUI/src/com/android/systemui/clipboardoverlay/EditTextActivity.java

@@ -34,7 +34,8 @@ import com.android.systemui.R;
 /**
  * Lightweight activity for editing text clipboard contents
  */
-public class EditTextActivity extends Activity {
+public class EditTextActivity extends Activity
+        implements ClipboardManager.OnPrimaryClipChangedListener {
     private static final String TAG = "EditTextActivity";
 
     private EditText mEditText;
@@ -71,6 +72,18 @@ public class EditTextActivity extends Activity {
         }
         mEditText.setText(clip.getItemAt(0).getText());
         mEditText.requestFocus();
+        mClipboardManager.addPrimaryClipChangedListener(this);
+    }
+
+    @Override
+    protected void onPause() {
+        mClipboardManager.removePrimaryClipChangedListener(this);
+        super.onPause();
+    }
+
+    @Override // ClipboardManager.OnPrimaryClipChangedListener
+    public void onPrimaryClipChanged() {
+        hideImeAndFinish();
     }
 
     private void saveToClipboard() {