Add SetValue for unsigned long for uint64_t

google::protobuf::uint64 is changing from unsigned long long to
uint64_t, which is sometimes unsigned long long and sometimes
unsigned long.  Add a SetValue specialization for unsigned long.
Mark both the unsigned long and unsigned long long specializations
as sometimes unused, they will be unused if uint64_t is the other.

Bug: 117607748
Test: m checkbuild
Change-Id: I8bec0be6cd7e13354cf96a7e510fe2b920aec561

libwvdrmengine/mediadrm/src_hidl/hidl_metrics_adapter.cpp

@@ -48,6 +48,13 @@ void SetValue(const unsigned int& value,
   attribute->int64Value = value;
 }
 template<>
+__attribute__((unused))
+void SetValue(const unsigned long& value,
+              DrmMetricGroup::Attribute* attribute) {
+  attribute->int64Value = value;
+}
+template<>
+__attribute__((unused))
 void SetValue(const unsigned long long& value,
               DrmMetricGroup::Attribute* attribute) {
   attribute->int64Value = value;