Replace ModuleContext.AConfig() with Config()

AConfig() now duplicates Config().  Replace the uses of AConfig()
with Config().  Leave AConfig() for now until code in other
projects is cleaned up.

Test: m checkbuild
Change-Id: Ic88be643049d21dba45dbd1a65588ed94bf43bdc

cc/compiler.go

@@ -218,7 +218,7 @@ func warningsAreAllowed(subdir string) bool {
 }
 
 func addToModuleList(ctx ModuleContext, list string, module string) {
-	getWallWerrorMap(ctx.AConfig(), list).Store(module, true)
+	getWallWerrorMap(ctx.Config(), list).Store(module, true)
 }
 
 // Create a Flags struct that collects the compile flags from global values,
@@ -360,7 +360,7 @@ func (compiler *baseCompiler) compilerFlags(ctx ModuleContext, flags Flags, deps
 			fmt.Sprintf("${config.%sGlobalCflags}", hod))
 	}
 
-	if Bool(ctx.AConfig().ProductVariables.Brillo) {
+	if Bool(ctx.Config().ProductVariables.Brillo) {
 		flags.GlobalFlags = append(flags.GlobalFlags, "-D__BRILLO__")
 	}