Remove dump() from ContextHubEventLogger

Bug: 217576459
Test: m && ./vendor/google/tools/flashall
Test: gts-tradefed run everything --skip-system-status-check com.android.compatibility.common.tradefed.targetprep.NetworkConnectivityChecker --module GtsGmscoreHostTestCases --primary-abi-only --test com.google.android.gts.locationcontext.LocationContextHostTest#testContextHubBusyStartupNanoAppTest
Test: Restart CHRE
Test: adb shell dumpsys contexthub
Change-Id: I8d811eb11d969a1367dc4763d045ec303824eb7b