Remove unnecessary symlink for non-flattend APEXes

This change fixes a bug that symlinks to the system partition are
created in /system/apex/<apex_name> directories even when the APEXes are
non-flattened. The symlinks are needed only for flattened APEX (of
course regardless of whether the APEX is a primary one or not).

Bug: N/A
Test: examine /system/apex directory manually
Change-Id: I00bb1423d0a2497408f05e49767b42437210bab8
diff --git a/apex/androidmk.go b/apex/androidmk.go
index 5fa5bf0..34915cd 100644
--- a/apex/androidmk.go
+++ b/apex/androidmk.go
@@ -177,7 +177,7 @@
 			fmt.Fprintln(w, "include $(BUILD_SYSTEM)/soong_cc_prebuilt.mk")
 		} else {
 			fmt.Fprintln(w, "LOCAL_MODULE_STEM :=", fi.builtFile.Base())
-			if fi.builtFile == a.manifestPbOut {
+			if fi.builtFile == a.manifestPbOut && apexType == flattenedApex {
 				if a.primaryApexType {
 					// Make apex_manifest.pb module for this APEX to override all other
 					// modules in the APEXes being overridden by this APEX
@@ -187,7 +187,7 @@
 					}
 					fmt.Fprintln(w, "LOCAL_OVERRIDES_MODULES :=", strings.Join(patterns, " "))
 
-					if apexType == flattenedApex && len(a.compatSymlinks) > 0 {
+					if len(a.compatSymlinks) > 0 {
 						// For flattened apexes, compat symlinks are attached to apex_manifest.json which is guaranteed for every apex
 						postInstallCommands = append(postInstallCommands, a.compatSymlinks...)
 					}