Stop disabling the HiddenTypeParameter check

Doesn't appear to be necessary.

Bug: 306806877
Test: m checkapi
Change-Id: Ibcc62aa9ff4f06de110f81dec32b0008ec784b33
diff --git a/Android.bp b/Android.bp
index 0c08119..f568743 100644
--- a/Android.bp
+++ b/Android.bp
@@ -686,7 +686,6 @@
         "--hide CallbackInterface",
         "--hide DeprecationMismatch",
         "--hide HiddenSuperclass",
-        "--hide HiddenTypeParameter",
         "--hide MissingPermission",
         "--hide RequiresPermission",
         "--hide SdkConstant",