[MS54.8] Add hiddenapi-unsupported-t.txt to apex Android.bp

This is separated from ag/16657723 to avoid merge
conflict at downstream branches. For some downstream branches,
the library does not exist and this part is commented out.

Test: TH
Bug: 197717846
Merged-In: I4eeb7ea9cfc3139991caf0fc22474e0052a0391c
Merged-In: I33e0d699086c87ce8e940036c9a52908bbbcf6c5
Change-Id: I031e5687fa47594b50ca1b40570e01cdec356827

Tethering/apex/Android.bp

@@ -132,7 +132,10 @@ bootclasspath_fragment {
             "hiddenapi/hiddenapi-max-target-o-low-priority.txt",
             "hiddenapi/hiddenapi-max-target-o-low-priority-tiramisu.txt",
 	],
-        unsupported: ["hiddenapi/hiddenapi-unsupported.txt"],
+        unsupported: [
+            "hiddenapi/hiddenapi-unsupported.txt",
+            "hiddenapi/hiddenapi-unsupported-tiramisu.txt",
+        ],
     },
 }