Always show at least 1% when some space used.

Don't let the progress value round down to 0, since that would
be misleading.

Test: builds
Bug: 24017703
Change-Id: I6a0268361645da16af67e12bf7f6823d027dd72c

src/com/android/settings/deviceinfo/PublicVolumeSettings.java

@@ -166,7 +166,7 @@ public class PublicVolumeSettings extends SettingsPreferenceFragment {
                     result.value, result.units));
             mSummary.setSummary(getString(R.string.storage_volume_used,
                     Formatter.formatFileSize(context, totalBytes)));
-            mSummary.setPercent((int) ((usedBytes * 100) / totalBytes));
+            mSummary.setPercent(usedBytes, totalBytes);
         }
 
         if (mVolume.getState() == VolumeInfo.STATE_UNMOUNTED) {