Remove -isystem frameworks/av/include

Remove the last -isystem for global include directory (besides
bionic).

Bug: 31751828
Test: builds
Change-Id: I8f38332de8f0cffd5c56b9b5ebeacbaaf3a4faea
Merged-In: I8f38332de8f0cffd5c56b9b5ebeacbaaf3a4faea
(cherry picked from commit d13a457a45)

cc/compiler.go

@@ -219,7 +219,6 @@ func (compiler *baseCompiler) compilerFlags(ctx ModuleContext, flags Flags) Flag
 		if !(ctx.sdk() || ctx.vndk()) || ctx.Host() {
 			flags.SystemIncludeFlags = append(flags.SystemIncludeFlags,
 				"${config.CommonGlobalIncludes}",
-				"${config.CommonGlobalSystemIncludes}",
 				tc.IncludeFlags(),
 				"${config.CommonNativehelperInclude}")
 		}

cc/config/global.go

@@ -112,9 +112,6 @@ func init() {
 			"libnativehelper/include",
 			"frameworks/native/include",
 			"frameworks/native/opengl/include",
-		})
-	pctx.PrefixedPathsForOptionalSourceVariable("CommonGlobalSystemIncludes", "-isystem ",
-		[]string{
 			"frameworks/av/include",
 		})
 	// This is used by non-NDK modules to get jni.h. export_include_dirs doesn't help

cc/makevars.go

@@ -77,7 +77,7 @@ func makeVarsProvider(ctx android.MakeVarsContext) {
 
 	ctx.Strict("AIDL_CPP", "${aidlCmd}")
 
-	includeFlags, err := ctx.Eval("${config.CommonGlobalIncludes} ${config.CommonGlobalSystemIncludes}")
+	includeFlags, err := ctx.Eval("${config.CommonGlobalIncludes}")
 	if err != nil {
 		panic(err)
 	}