Use BytesFormatter for data usage

Change "480 B" to "480 byte".

And no longer use FormattedDataUsage.

Bug: 321861088
Flag: EXEMPT bug fix
Test: manual - App data usage
Test: unit test
Change-Id: I9ed220e2d5b8fc512d7d28f6fa7faebb37beab83

src/com/android/settings/datausage/DataUsageList.kt

@@ -172,7 +172,7 @@ open class DataUsageList : DashboardFragment() {
     private fun updateSelectedCycle(usageData: NetworkUsageData) {
         Log.d(TAG, "showing cycle $usageData")
 
-        usageAmount?.title = usageData.getDataUsedString(requireContext()).displayText
+        usageAmount?.title = usageData.getDataUsedString(requireContext())
         viewModel.selectedCycleFlow.value = usageData
 
         updateApps(usageData)