Suppress fortify-source warning

Found by clang-r510928:

AidlConversionCppNdk.cpp:1083:13: error: 'snprintf' will always be truncated; specified size is 32, but format string expands to at least 40 [-Werror,-Wfortify-source]
 1083 |             snprintf(addressBuffer, AUDIO_DEVICE_MAX_ADDRESS_LEN,
      |             ^

Test: presubmit
Change-Id: Iad914e5f5ca642e05fadb442a258ed3828388898
diff --git a/media/audioaidlconversion/AidlConversionCppNdk.cpp b/media/audioaidlconversion/AidlConversionCppNdk.cpp
index 947352f..2540cef 100644
--- a/media/audioaidlconversion/AidlConversionCppNdk.cpp
+++ b/media/audioaidlconversion/AidlConversionCppNdk.cpp
@@ -1080,9 +1080,13 @@
         case Tag::ipv6: {
             const std::vector<int32_t>& ipv6 = aidl.address.get<AudioDeviceAddress::ipv6>();
             if (ipv6.size() != 8) return BAD_VALUE;
+// FIXME: Code warning found by clang-r510928
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wfortify-source"
             snprintf(addressBuffer, AUDIO_DEVICE_MAX_ADDRESS_LEN,
                     "%04X:%04X:%04X:%04X:%04X:%04X:%04X:%04X",
                     ipv6[0], ipv6[1], ipv6[2], ipv6[3], ipv6[4], ipv6[5], ipv6[6], ipv6[7]);
+#pragma clang diagnostic pop
         } break;
         case Tag::alsa: {
             const std::vector<int32_t>& alsa = aidl.address.get<AudioDeviceAddress::alsa>();