Fix sanitizer in ISensorService list functions.

The integer overflow sanitizer is throwing unsigned integer overflow
errors in the list functions in ISensorService. This refactors the loops
to prevent the overflow on the last iteration.

Test: Compiles and device boots without sanitizer errors.
Bug: 30969751
Change-Id: I6a7993024fdc71702e8e4e8ae535cfaf999e9dab
Merged-In: I6a7993024fdc71702e8e4e8ae535cfaf999e9dab