libvrflinger: Move some tracing to a more verbose level.

Quiet the logs when using TRACE=1.

Bug: None
Test: Set TRACE=1; build; observe traces do not appear.
Change-Id: I521fa5cf4b0ab18e73f89a1898bf2d58fc2d1f88
diff --git a/libs/vr/libvrflinger/vsync_service.cpp b/libs/vr/libvrflinger/vsync_service.cpp
index 2a83933..3098b43 100644
--- a/libs/vr/libvrflinger/vsync_service.cpp
+++ b/libs/vr/libvrflinger/vsync_service.cpp
@@ -200,12 +200,12 @@
 }
 
 void VSyncChannel::Ack() {
-  ALOGD_IF(TRACE, "VSyncChannel::Ack: pid=%d cid=%d\n", pid_, cid_);
+  ALOGD_IF(TRACE > 1, "VSyncChannel::Ack: pid=%d cid=%d\n", pid_, cid_);
   service_.ModifyChannelEvents(cid_, POLLPRI, 0);
 }
 
 void VSyncChannel::Signal() {
-  ALOGD_IF(TRACE, "VSyncChannel::Signal: pid=%d cid=%d\n", pid_, cid_);
+  ALOGD_IF(TRACE > 1, "VSyncChannel::Signal: pid=%d cid=%d\n", pid_, cid_);
   service_.ModifyChannelEvents(cid_, 0, POLLPRI);
 }