For battery chart 7-bar case, remove the center two labels according to UX designer's suggestion.

latest screenshots: https://drive.google.com/drive/folders/1V2UoBO2tOVydVxT5Yd5ASruuzizy-s7F?resourcekey=0-z2UInYUQ3mLGG80hedO78A&usp=sharing

Test: manual
Bug: 242009481
Change-Id: I3f717add0bcce1d3697c9ff6e91032e3817e6304
(cherry picked from commit 53b816c7)