Revert "[infra] Roll clang to match the version used by Flutter"

build/config/android/config.gni

Index: build/config/android/config.gni
diff --git a/build/config/android/config.gni b/build/config/android/config.gni
index b8d705fceb53f6e49f66f6143df0b8f68fba4bc9..33469666d338c740db46b93a94886c734d29acbd 100644
--- a/build/config/android/config.gni
+++ b/build/config/android/config.gni
@@ -62,11 +62,7 @@ if (is_android) {
 
   # Subdirectories inside android_ndk_root that contain the sysroot for the
   # associated platform.
-  if (current_cpu == "x64" || current_cpu == "arm64") {
-    _android_api_level = 22
-  } else {
-    _android_api_level = 16
-  }
+  _android_api_level = 16
   x86_android_sysroot_subdir =
       "platforms/android-${_android_api_level}/arch-x86"
   arm_android_sysroot_subdir =
@@ -174,5 +170,5 @@ if (is_android) {
     assert(false, "Unknown Android ABI: " + current_cpu)
   }
 
-  android_log_tag = "\"dart\""
+  android_log_tag = "\"flutter\""
 }