logd: cap out-of-order entry search

Reduce the period we are willing to look back at for out-of-order
entries.  Cap the number of iterations we are willing to look back
for out-of-order entries to 300.

Test: gTest liblog-unit-tests, logd-unit-tests and logcat-unit-tests
Bug: 36875387
Bug: 36874561
Bug: 36861142
Change-Id: Icee289dfc0a37ccab9912dc8ab40a10ef3967b7a