ozone: Add ability to set clinet capabilities which we will need for atomic

ui/ozone/platform/drm/test/mock_drm_device.cc

Index: ui/ozone/platform/drm/test/mock_drm_device.cc
diff --git a/ui/ozone/platform/drm/test/mock_drm_device.cc b/ui/ozone/platform/drm/test/mock_drm_device.cc
index 0b1e3485e0c5553bbe25167f46edbd1782780724..e35ff5a8d1033953261307c125a4f31814250c3d 100644
--- a/ui/ozone/platform/drm/test/mock_drm_device.cc
+++ b/ui/ozone/platform/drm/test/mock_drm_device.cc
@@ -245,6 +245,10 @@ bool MockDrmDevice::SetGammaRamp(uint32_t crtc_id,
   return true;
 }
 
+bool MockDrmDevice::SetCapability(uint64_t capability, uint64_t value) {
+  return false;
+}
+
 void MockDrmDevice::RunCallbacks() {
   while (!callbacks_.empty()) {
     PageFlipCallback callback = callbacks_.front();