Don't hide 1% battery usage apps but show percentage "-" instead.

Bug b/242252864 will be fixed at the same time.

screen_record: https://drive.google.com/open?id=1ycEuazqQZzNWGO8E2Fh3GdgyTEd2Z9s0&authuser=0&resourcekey=0-x9BJJE6932jIv9fFoecjeQ&usp=drive_link

Bug: 262187603
Bug: 242252864
Fix: 262187603
Fix: 242252864
Test: manual
Change-Id: Id1a8b5291d66a38fb86f168d3115ae566e6ec079