Refactor common testing code for layerlifecyclemanager

Pull out some helper functions that can be used with benchmark tests.

Flag: EXEMPT refactor
Bug: 353535845
Test: presubmit
Change-Id: I59392645e2b0bc675a2feb0f3e01ac91f7a57d1d
diff --git a/services/surfaceflinger/tests/common/Android.bp b/services/surfaceflinger/tests/common/Android.bp
new file mode 100644
index 0000000..2dfa8af
--- /dev/null
+++ b/services/surfaceflinger/tests/common/Android.bp
@@ -0,0 +1,13 @@
+package {
+    // See: http://go/android-license-faq
+    // A large-scale-change added 'default_applicable_licenses' to import
+    // all of the 'license_kinds' from "frameworks_native_license"
+    // to get the below license kinds:
+    //   SPDX-license-identifier-Apache-2.0
+    default_applicable_licenses: ["frameworks_native_license"],
+}
+
+cc_library_headers {
+    name: "surfaceflinger_tests_common_headers",
+    export_include_dirs: ["."],
+}