Set the ID of TV grant layout to grant_dialog

CTS now requires grant dialogs to have a UI element with the ID of
"grant_dialog" or three cases in CtsPermissionTestCases will not
pass.

The case we need to comply with now is a parameterised test:
  - UndefinedGroupPermissionTest#testOtherGroupPermissionsNotGranted

Test: atest android.permission.cts.UndefinedGroupPermissionTest
Test: atest CtsPermissionTestCases
Test: atest CtsPermission2TestCases
Test: atest CtsPermission3TestCases
Bug: 155356284
Change-Id: Id399dc0703b4de7e436b7ba320eabcfb033acdd0

res/layout-television/grant_permissions.xml

diff --git a/res/layout-television/grant_permissions.xml b/res/layout-television/grant_permissions.xml
index 14bbca3..bda9071 100644
--- a/res/layout-television/grant_permissions.xml
+++ b/res/layout-television/grant_permissions.xml
@@ -16,6 +16,7 @@
 
 <LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/grant_dialog"
     android:orientation="horizontal"
     android:paddingLeft="@dimen/action_dialog_padding_left"
     android:paddingRight="@dimen/action_dialog_padding_right"