healthd: cover devices that have voltage_max file with value of 0

its perfectly fine to use default value also in those cases
instead of not adding anything at all and breaking
fast vs. slow charging calc in framework

Change-Id: I098660592dcb1c877ad15ed2b5c3b40cc2d414e6
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
1 file changed