Fix Battery Defender tests to take into account the minimum time to
write a file

Test: 'atest HealthTestCases'
Bug: 175614345
Merged-In: I2c8bfa013e9db80ad879856a2e58ca14f2406901
Change-Id: I2c8bfa013e9db80ad879856a2e58ca14f2406901
(cherry picked from commit 9115cc9b3e0cf0869b37b6e3187b70daaeb50d9f)
1 file changed