Unrevert update references to backup agent timeouts

Reintroduce change (ag/3742803) that was reverted due to SUW crash
(ag/3780292).

Updates references to backup/restore agent timeouts from hardcoded
constants to the Global setting backup_agent_timeout_parameters.

Bug: 70276070
Test: 1) m -j RunFrameworksServicesRoboTests
2) Manual testing of affected backup/restore paths:
- Wipe device; restore cloud backup via SUW
- adb shell bmgr list sets
- adb shell bmgr restore [package]
- adb shell bmgr restore [token]
- adb backup -all
- adb backup -shared
- adb backup -obb -all
- adb shell bmgr backupnow --all
- adb shell bmgr backupnow [key value package]
- adb shell bmgr backupnow [full data package]
- adb backup -keyvalue [key value package]
- adb restore backup.ab

Change-Id: I871fd32c7601bbe6b06a0c8516bb85bc0ead4198