SF: Test coverage for EventThread

Add a unit test to cover EventThread.cpp

Test: atest libsurfaceflinger_unittest
Bug: 74827900
Change-Id: If9479cd9deedff836068cb53e7da2cb64041aea1
diff --git a/services/surfaceflinger/tests/unittests/Android.bp b/services/surfaceflinger/tests/unittests/Android.bp
index bcabe0d..3e9f6a4 100644
--- a/services/surfaceflinger/tests/unittests/Android.bp
+++ b/services/surfaceflinger/tests/unittests/Android.bp
@@ -20,6 +20,7 @@
     srcs: [
         ":libsurfaceflinger_sources",
         "DisplayTransactionTest.cpp",
+        "EventThreadTest.cpp",
         "mock/DisplayHardware/MockComposer.cpp",
         "mock/DisplayHardware/MockDisplaySurface.cpp",
         "mock/gui/MockGraphicBufferConsumer.cpp",