Set RESULT_OK on exit via copy button.

Bug: 188778935
Test: manual & atest ChooserActivityTest
Change-Id: I6a45a14bd145234e9a7743bb6e68fe05ac05de46

core/java/com/android/internal/app/ChooserActivity.java

@@ -1093,6 +1093,7 @@ public class ChooserActivity extends ResolverActivity implements
                     "",
                     -1);
 
+            setResult(RESULT_OK);
             finish();
         }
     }

core/tests/coretests/AndroidManifest.xml

@@ -156,6 +156,9 @@
     <!-- Allow use of PendingIntent.getIntent() -->
     <uses-permission android:name="android.permission.GET_INTENT_SENDER_INTENT" />
 
+    <!-- ChooserActivityTest permissions-->
+    <uses-permission android:name="android.permission.SET_CLIP_SOURCE" />
+
     <application android:theme="@style/Theme" android:supportsRtl="true">
         <uses-library android:name="android.test.runner" />
         <uses-library android:name="org.apache.http.legacy" android:required="false" />

core/tests/coretests/src/com/android/internal/app/ChooserActivityTest.java

@@ -16,6 +16,8 @@
 
 package com.android.internal.app;
 
+import static android.app.Activity.RESULT_OK;
+
 import static androidx.test.espresso.Espresso.onView;
 import static androidx.test.espresso.action.ViewActions.click;
 import static androidx.test.espresso.action.ViewActions.swipeUp;
@@ -558,6 +560,8 @@ public class ChooserActivityTest {
 
         ClipDescription clipDescription = clipData.getDescription();
         assertThat("text/plain", is(clipDescription.getMimeType(0)));
+
+        assertEquals(mActivityRule.getActivityResult().getResultCode(), RESULT_OK);
     }
 
     @Test