Fix cancel button on screen recording dialog when PSS enabled

Clicking the cancel button was doing nothing, as the cancel click
listener was not implemented.

Test: ScreenRecordPermissionDialogTest.kt
Test: Manually
Fixes: 284439734
Change-Id: I1f740f87d080645b9fd34256e9abf5b3765dcde5

packages/SystemUI/src/com/android/systemui/screenrecord/ScreenRecordPermissionDialog.kt

@@ -93,6 +93,7 @@ class ScreenRecordPermissionDialog(
             }
             dismiss()
         }
+        setCancelButtonOnClickListener { dismiss() }
         initRecordOptionsView()
     }
 

packages/SystemUI/tests/src/com/android/systemui/screenrecord/ScreenRecordPermissionDialogTest.kt

@@ -104,6 +104,26 @@ class ScreenRecordPermissionDialogTest : SysuiTestCase() {
         assertThat(visibility).isEqualTo(View.VISIBLE)
     }
 
+    @Test
+    fun showDialog_dialogIsShowing() {
+        dialog.show()
+
+        assertThat(dialog.isShowing).isTrue()
+    }
+
+    @Test
+    fun showDialog_cancelClicked_dialogIsDismissed() {
+        dialog.show()
+
+        clickOnCancel()
+
+        assertThat(dialog.isShowing).isFalse()
+    }
+
+    private fun clickOnCancel() {
+        dialog.requireViewById<View>(android.R.id.button2).performClick()
+    }
+
     private fun onSpinnerItemSelected(position: Int) {
         val spinner = dialog.requireViewById<Spinner>(R.id.screen_share_mode_spinner)
         spinner.onItemSelectedListener.onItemSelected(spinner, mock(), position, /* id= */ 0)