SF: fix binder thread priority

Add setMinSchedulerPolicy to all binder interfaces SF exposes.
It was missing from gui::ISurfaceComposer and
gui::IDisplayEventConnection.

Test: presubmit
Bug: 299378819
Change-Id: Ia0d99efa5a3bc58625c320d4df3c08bb597d2e38
diff --git a/services/surfaceflinger/tests/Android.bp b/services/surfaceflinger/tests/Android.bp
index b5168b0..36b1972 100644
--- a/services/surfaceflinger/tests/Android.bp
+++ b/services/surfaceflinger/tests/Android.bp
@@ -30,6 +30,7 @@
     test_suites: ["device-tests"],
     srcs: [
         "BootDisplayMode_test.cpp",
+        "Binder_test.cpp",
         "BufferGenerator.cpp",
         "CommonTypes_test.cpp",
         "Credentials_test.cpp",