Update vold to log only debug or higher level messages.

This will allow adding lots of verbose logs which can be enabled
only during local testing/debugging. Update the existing verbose
level logs to debug level since we want those to be logged by
default.

Test: manual
Change-Id: Ib05e2b6efa71308458d49affb6ed81d3975b28ab
diff --git a/Benchmark.cpp b/Benchmark.cpp
index 7fbf92e..b0a3b85 100644
--- a/Benchmark.cpp
+++ b/Benchmark.cpp
@@ -137,12 +137,12 @@
     // Only drop when we haven't aborted
     if (res == OK) {
         android::base::Timer timer;
-        LOG(VERBOSE) << "Before drop_caches";
+        LOG(DEBUG) << "Before drop_caches";
         if (!WriteStringToFile("3", "/proc/sys/vm/drop_caches")) {
             PLOG(ERROR) << "Failed to drop_caches";
             res = -1;
         }
-        LOG(VERBOSE) << "After drop_caches";
+        LOG(DEBUG) << "After drop_caches";
         sync();
         if (res == OK) extras->putLong(String16("drop"), timer.duration().count());
     }