Make CallLogCache thread safe.

Methods such as getAccountLabel() is called on different threads which may cause
race condition issue.
This change also delete CallLogCacheLollopopMr1 since it's not necessary that Dialer is targeting M+.

Bug: 63415147,63524435
Test: none
PiperOrigin-RevId: 161440757
Change-Id: Ia609c52e53dabdce78ffb4320f4cd66e38112e47