Statically link missing libraries to libsurfaceflinger_unittest

Some targets do not have the library in their system or
vendor image so the test fails to run.

Fixes: 170341496
Test: atest -a libsurfaceflinger_unittest on cf_x86_64_phone-userdebug

Change-Id: I61e7702e6b36f218bebc7c87853001861a92741e
diff --git a/services/surfaceflinger/tests/Android.bp b/services/surfaceflinger/tests/Android.bp
index 02b4308..e8b24b4 100644
--- a/services/surfaceflinger/tests/Android.bp
+++ b/services/surfaceflinger/tests/Android.bp
@@ -46,7 +46,7 @@
     data: ["SurfaceFlinger_test.filter"],
     static_libs: [
         "libtrace_proto",
-        "liblayers_proto_static",
+        "liblayers_proto",
         "android.hardware.graphics.composer@2.1",
     ],
     shared_libs: [