Support waiting for surfaceflinger service to stop before test starts

Bug: 168787663
Test: atest VtsHalGraphicsComposerV2_1TargetTest \
  VtsHalGraphicsComposerV2_2TargetTest \
  VtsHalGraphicsComposerV2_3TargetTest
Change-Id: I1219b8446ca3ac3d22f3fd6ab72cd8a214f55545
diff --git a/graphics/composer/2.3/vts/functional/Android.bp b/graphics/composer/2.3/vts/functional/Android.bp
index 1ab6b3b..1cbb60e 100644
--- a/graphics/composer/2.3/vts/functional/Android.bp
+++ b/graphics/composer/2.3/vts/functional/Android.bp
@@ -21,6 +21,7 @@
 
     // TODO(b/64437680): Assume these libs are always available on the device.
     shared_libs: [
+        "libbase",
         "libfmq",
         "libhidlbase",
         "libsync",
diff --git a/graphics/composer/2.3/vts/functional/VtsHalGraphicsComposerV2_3TargetTest.cpp b/graphics/composer/2.3/vts/functional/VtsHalGraphicsComposerV2_3TargetTest.cpp
index 94766af..63af900 100644
--- a/graphics/composer/2.3/vts/functional/VtsHalGraphicsComposerV2_3TargetTest.cpp
+++ b/graphics/composer/2.3/vts/functional/VtsHalGraphicsComposerV2_3TargetTest.cpp
@@ -19,6 +19,7 @@
 #include <algorithm>
 
 #include <android-base/logging.h>
+#include <android-base/properties.h>
 #include <android/hardware/graphics/mapper/2.0/IMapper.h>
 #include <composer-command-buffer/2.3/ComposerCommandBuffer.h>
 #include <composer-vts/2.1/GraphicsComposerCallback.h>
@@ -628,3 +629,15 @@
 }  // namespace graphics
 }  // namespace hardware
 }  // namespace android
+
+int main(int argc, char** argv) {
+    ::testing::InitGoogleTest(&argc, argv);
+
+    using namespace std::chrono_literals;
+    if (!android::base::WaitForProperty("init.svc.surfaceflinger", "stopped", 10s)) {
+        ALOGE("Failed to stop init.svc.surfaceflinger");
+        return -1;
+    }
+
+    return RUN_ALL_TESTS();
+}
\ No newline at end of file