grant post_notifications to terminal app by default

Bug: 376790482
Test: flash and check permissions
Change-Id: If35bb385ce24383831bdc54354a9cdd4a30bccf2
diff --git a/build/apex/permissions/Android.bp b/build/apex/permissions/Android.bp
index 678a4f2..d773df6 100644
--- a/build/apex/permissions/Android.bp
+++ b/build/apex/permissions/Android.bp
@@ -23,3 +23,9 @@
     src: "features_com.android.virt.xml",
     soc_specific: true,
 }
+
+prebuilt_etc {
+    name: "default-permissions_com.android.virt.xml",
+    sub_dir: "default-permissions",
+    src: "default-permissions_com.android.virt.xml",
+}