Refactor EmulatorRunner and AdbRunner to use ProcessUtils

Addresses PR #283/#284 feedback to use existing ProcessUtils.
Simplifies API by throwing exceptions on failure instead of
returning result types with error states.

Changes:
- AdbRunner: Simplified using ProcessUtils.RunToolAsync()
- EmulatorRunner: Uses ProcessUtils.StartToolBackground()
- Removed duplicate AndroidDeviceInfo from Models directory

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: rmarinho