Pin third_party/upb to C17. am: 8e1018b031

Original change: https://android-review.googlesource.com/c/platform/external/grpc-grpc/+/3320794

Change-Id: I89d2dda888a544daf7f710e46b7d996b72a27483
Signed-off-by: Automerger Merge Worker <[email protected]>
diff --git a/third_party/upb/Android.bp b/third_party/upb/Android.bp
index 01eab1b..6569899 100644
--- a/third_party/upb/Android.bp
+++ b/third_party/upb/Android.bp
@@ -86,6 +86,8 @@
     cflags: [
         "-Wno-unused-parameter",
     ],
+    // Pin this project to C17 until we have upstream's NULL/false confusion fixes.
+    c_std: "gnu17",
     static_libs: [
         "libgrpc_third_party_utf8_range",
         "libgrpc_upb_protos",