RESTRICT AUTOMERGE Ignore weak symbol difference in libui ABI check

The diff_flags make the ABI checker ignore the weak symbol difference
caused by PGO.

Test: make libui.vendor
Bug: 230076879
Change-Id: I81de5b6109e3980abffcc3ff4aa90b9debd206e3
diff --git a/libs/ui/Android.bp b/libs/ui/Android.bp
index a9380c6..d138495 100644
--- a/libs/ui/Android.bp
+++ b/libs/ui/Android.bp
@@ -243,6 +243,10 @@
     ],
 
     afdo: true,
+
+    header_abi_checker: {
+        diff_flags: ["-allow-adding-removing-weak-symbols"],
+    },
 }
 
 cc_library_headers {