Support fastboot variable battery-soc-ok

Bug: 79480454
Test: fastboot getvar battery-soc-ok

Change-Id: Icfd70a71f1598e437316d4b8f895fd851516febb
Merged-In: Icfd70a71f1598e437316d4b8f895fd851516febb
(cherry picked from commit 9a1203b7acf7cf3a09ccec022c4698c994143bbd)
4 files changed