Use more memorable starting timeouts in the SoftwareRateLimiter

This was requested by UX, so that there won't be a difference between
the actual and displayed starting timeouts.

Bug: 439637647
Test: atest FrameworksServicesTests:com.android.server.locksettings
Flag: EXEMPT BUGFIX
Change-Id: I7d31feecc940a67952ecd91a3e92abfcd2b5f8a8