Suppress lint warnings on google-default-arguments

The lint rule google-default-arguments ensures that virtual or override
methods do not have default arguments, because different default values
across the hierarchy chain (e.g. Base::foo(int a=0) v.s.
Derived::foo(int a=10)) can cause confusions.

However, since the uses of the default arguments in libbinder don't lead
to such problem, suppress the warnings.

Test: WITH_TIDY=true WITH_TIDY_CHECKS=google-default-arguments m
libbinder does not show any warning about google-default-arguments

Change-Id: I90f6d05a9dc3232d0c63563df18a582432b83574
diff --git a/libs/binder/IAppOpsService.cpp b/libs/binder/IAppOpsService.cpp
index 068664b..fb0d521 100644
--- a/libs/binder/IAppOpsService.cpp
+++ b/libs/binder/IAppOpsService.cpp
@@ -129,6 +129,7 @@
 
 // ----------------------------------------------------------------------
 
+// NOLINTNEXTLINE(google-default-arguments)
 status_t BnAppOpsService::onTransact(
     uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
 {