Expose libdvr private headers as a header library

Bug: 78173557
Bug: 78171546
Test: dvr_api-test
Change-Id: I6cd4bea0ba59379fcb3b668cd360d81a369423f2
diff --git a/libs/vr/libdvr/Android.bp b/libs/vr/libdvr/Android.bp
index d2f3285..00e4d4e 100644
--- a/libs/vr/libdvr/Android.bp
+++ b/libs/vr/libdvr/Android.bp
@@ -19,6 +19,12 @@
     vendor_available: true,
 }
 
+cc_library_headers {
+    name: "libdvr_private_headers",
+    export_include_dirs: ["."],
+    vendor_available: false,
+}
+
 cflags = [
     "-DDVR_TRACKING_IMPLEMENTED=0",
     "-DLOG_TAG=\"libdvr\"",