Throttler for incidentd based on size putting into dropbox.

The incidentd will accumulate the total size put into dropbox and once
it exceeds a threshold (currently 20MB) daily, it will stop further
requests. It allows collection again 24 hours later.

Bug: 64219725
Test: atest incidentd_test and manually flashed incidentd and test.
Change-Id: Iea21fbae40d5d01108797b190231d73e74eff213
diff --git a/cmds/incidentd/src/FdBuffer.cpp b/cmds/incidentd/src/FdBuffer.cpp
index 883924c8..db60794 100644
--- a/cmds/incidentd/src/FdBuffer.cpp
+++ b/cmds/incidentd/src/FdBuffer.cpp
@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+#define DEBUG false
 #include "Log.h"
 
 #include "FdBuffer.h"