Start/Exit info catch exception on write fail

When write fails due to ENOSPC, ProtoOutputStream may throw a
RuntimeException, catch it so it doesn't crash system server.

Last write time is already updated so the write will be attempted
again at the next scheduled time (no sooner than 30 minutes).
Additional logic to determine whether subsequent writes should
not be attempted is warranted and will be investigated separately.

Bug: 341047085
Test: presubmit
Flag: EXEMPT - simple bugfix
Change-Id: Ib5f31c7e4fdb90d9f563145d4f66ff8cc161fe45