[BatteryStats] Correct formatter for pkginst in battery stats.

Symptom:
Wrong format is output for pkginst in battery stats.

Root cause:
Formatter for pkginst in battery stats is required to sIntToString
but it was defined sUidToString.

Solution:
Correct formatter for pkginst in battery stats to sIntToString
from sUidToString.

Bug: 113559700
Change-Id: I43eb7aba37c8723337dbbaea9f6a6eacfb01d259
1 file changed