Change log level of superfluous logs

Test: go/wm-smoke, check logcat for error logs
Bug: 175167649
Change-Id: Iacdff89e4c1ea2827a5783c98d342532666b772f
diff --git a/services/surfaceflinger/ClientCache.cpp b/services/surfaceflinger/ClientCache.cpp
index 2ae49fa..44b33ef 100644
--- a/services/surfaceflinger/ClientCache.cpp
+++ b/services/surfaceflinger/ClientCache.cpp
@@ -48,7 +48,7 @@
 
     auto bufItr = processBuffers.find(id);
     if (bufItr == processBuffers.end()) {
-        ALOGE("failed to get buffer, invalid buffer id");
+        ALOGV("failed to get buffer, invalid buffer id");
         return false;
     }
 
@@ -150,7 +150,7 @@
 
     ClientCacheBuffer* buf = nullptr;
     if (!getBuffer(cacheId, &buf)) {
-        ALOGE("failed to register erased recipient, could not retrieve buffer");
+        ALOGV("failed to register erased recipient, could not retrieve buffer");
         return false;
     }
     buf->recipients.insert(recipient);