support Android 10 ROMs with unpacked APEX

CommonInstaller

@@ -240,7 +240,8 @@ mount_partitions () {
 	SYSTEM_AS_ROOT=$(getprop ro.build.system_root_image)
 	SYSTEM_BLOCK=/dev/block/bootdevice/by-name/system
 
-	RUNTIME_APEX=""
+	APEX_FILE=""
+	APEX_DIR=""
 	APEX_LOOP=""
 
 	if [ "${SYSTEM_AS_ROOT}" == "true" ]; then
@@ -268,21 +269,27 @@ mount_partitions () {
 
 	[ ! -f /system/build.prop ] && error "failed to mount /system (unsupported A/B device?)"
 
-	if [ -f /system/apex/com.android.runtime.apex ]; then
-		RUNTIME_APEX="/system/apex/com.android.runtime.apex"
-	elif [ -f /system/apex/com.android.runtime.release.apex ]; then
-		RUNTIME_APEX="/system/apex/com.android.runtime.release.apex"
-	fi
+	for apex in com.android.runtime com.android.runtime.release com.android.runtime.debug; do
+		if [ -f /system/apex/${apex}.apex ]; then
+			APEX_FILE=/system/apex/${apex}.apex
+			break
+		elif [ -d /system/apex/${apex} ]; then
+			APEX_DIR=/system/apex/${apex}
+			break
+		fi
+	done
 
-	if [ -n "${RUNTIME_APEX}" ]; then
+	if [ -n "${APEX_FILE}" ]; then
 		mkdir -p /dev/tmp/apex
 		unzip "${RUNTIME_APEX}" -d /dev/tmp/apex
 
 		mkdir -p /apex/com.android.runtime
-
 		mount -oloop,ro /dev/tmp/apex/apex_payload.img /apex/com.android.runtime
 
 		APEX_LOOP=$(mount | awk '/com.android.runtime/{print $1}')
+	elif [ -n "${APEX_DIR}" ]; then
+		mkdir -p /apex
+		ln -sf "${APEX_DIR}" /apex/com.android.runtime
 	fi
 
 	! is_mounted /vendor && mount /vendor