sdm: Add single system image support

Add display_intf_headers to support single system image.

CRs-Fixed: 2251141
Change-Id: Ib88d0cc0107c5d463e2b612cb93dfd549bd6081e

Android.bp

@@ -33,6 +33,18 @@ cc_library_headers {
     export_header_lib_headers: ["libhardware_headers"],
 }
 
+cc_library_headers {
+    name: "display_intf_headers",
+    vendor_available: true,
+    export_include_dirs: [
+        "include",
+        "libqdutils",
+        "gralloc",
+    ],
+    header_libs: ["libhardware_headers"],
+    export_header_lib_headers: ["libhardware_headers"],
+}
+
 subdirs = [
     "libqservice",
     "libqdutils",