Remove legacy proto helper functions

Flag: EXEMPT (removing old flags)
Bug: 330785038
Test: presubmit
Change-Id: I2ced9157bf9aa3541b16cde5495131e82387772a
diff --git a/services/surfaceflinger/tests/unittests/Android.bp b/services/surfaceflinger/tests/unittests/Android.bp
index 9ebef8c..215f49d 100644
--- a/services/surfaceflinger/tests/unittests/Android.bp
+++ b/services/surfaceflinger/tests/unittests/Android.bp
@@ -153,6 +153,7 @@
         "android.hardware.power-ndk_static",
         "librenderengine_deps",
         "libsurfaceflinger_common_test_deps",
+        "libsurfaceflinger_proto_deps",
     ],
     static_libs: [
         "android.hardware.common-V2-ndk",
@@ -171,7 +172,6 @@
         "libframetimeline",
         "libgmock",
         "libgui_mocks",
-        "liblayers_proto",
         "libperfetto_client_experimental",
         "librenderengine",
         "librenderengine_mocks",