[People Service] Catch possible `SQLiteException` when querying CP2

Following a similar pattern from [ValidateNotificationPeople](http://cs/android-internal/frameworks/base/services/core/java/com/android/server/notification/ValidateNotificationPeople.java;l=500-513;rcl=0741d64d094a3a075146b4e18f10e01cc5c1d8b2), we catch a possible `SQLiteException` when querying CP2 for people data that might occur when CP2 is occurring high write contention (such as during a device locale change).

Bug: 252333206
Change-Id: I65190e2496fc49168048fdd34208c5d55bfb4048