[android][aidl] Suppress conversion warning

llvm/llvm-project#138708 now warns when mixing
charN_types.

This conversion warning is suppressed for aidl's dependency on
third_party/googletest until this gets resolved in upstream googletest:
google/googletest#4762

Bug: 418047052
Change-Id: I0e6e6fcd6d37a018a0d7933217bd58c6f3b45d39
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1279146
Commit-Queue: Auto-Submit <auto-submit-builder@fuchsia-internal-service-accts.iam.gserviceaccount.com>
Fuchsia-Auto-Submit: Caslyn Tonelli <[email protected]>
Reviewed-by: Aaron Wood <[email protected]>

Author: Caslyn

build/config/BUILD.gn

@@ -923,6 +923,11 @@ config("Wno-undef") {
   visibility = [ "//third_party/googletest:*" ]
 }
 
+config("Wno-character-conversion") {
+  cflags = [ "-Wno-character-conversion" ]
+  visibility = [ "//src/lib/android/aidl:*" ]
+}
+
 config("Wno-bitfield-conversion") {
   cflags = [ "-Wno-bitfield-conversion" ]
   visibility = [ "//src/lib/vulkan:*" ]

src/lib/android/aidl/BUILD.gn

@@ -101,6 +101,10 @@ if (is_host) {
       "//src/lib/android/libbase",
       "//src/lib/android/logging",
     ]
+
+    # TODO(https://fxbug.dev/418047052): Remove when upstream googletest
+    # resolves https://github.com/google/googletest/issues/4762
+    configs += [ "//build/config:Wno-character-conversion" ]
   }
 
   rustc_binary("aidl_wrapper") {