Pass min_sdk_version to cc __ANDROID_SDK_VERSION__

The macro is required only for apex variants regardless of useVndk.
Before the enforcement of LLNDK sdk version, the macro was not passed to
vendor variants.

Bug: 151689896
Test: TARGET_BUILD_APPS=com.android.media.swcodec m
      libbase in swcodec apex is linked with liblog#29
      (compiled with __ANDROID_SDK_VERSIO__=29)

Change-Id: I57fa4afe027eb39b98bd94d534be9ebe11713f19
diff --git a/cc/compiler.go b/cc/compiler.go
index fe81bd0..681b1ab 100644
--- a/cc/compiler.go
+++ b/cc/compiler.go
@@ -315,18 +315,6 @@
 			"-isystem "+getCurrentIncludePath(ctx).Join(ctx, config.NDKTriple(tc)).String())
 	}
 
-	if ctx.canUseSdk() {
-		sdkVersion := ctx.sdkVersion()
-		if sdkVersion == "" || sdkVersion == "current" {
-			if ctx.isForPlatform() {
-				sdkVersion = strconv.Itoa(android.FutureApiLevel)
-			} else {
-				sdkVersion = strconv.Itoa(ctx.apexSdkVersion())
-			}
-		}
-		flags.Global.CommonFlags = append(flags.Global.CommonFlags, "-D__ANDROID_SDK_VERSION__="+sdkVersion)
-	}
-
 	if ctx.useVndk() {
 		flags.Global.CommonFlags = append(flags.Global.CommonFlags, "-D__ANDROID_VNDK__")
 	}
@@ -340,6 +328,9 @@
 		if Bool(compiler.Properties.Use_apex_name_macro) {
 			flags.Global.CommonFlags = append(flags.Global.CommonFlags, "-D__ANDROID_APEX_"+makeDefineString(ctx.apexName())+"__")
 		}
+		if ctx.Device() {
+			flags.Global.CommonFlags = append(flags.Global.CommonFlags, "-D__ANDROID_SDK_VERSION__="+strconv.Itoa(ctx.apexSdkVersion()))
+		}
 	}
 
 	instructionSet := String(compiler.Properties.Instruction_set)