Async load eid in SimEidPreferenceController

Avoid data loading in getAvailabilityStatus() to prevent ANR, override
updateNonIndexableKeys() for search availability.

Fix: 304560734
Test: manual - on "About phone" page
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:b6e44ce818a5284a612a31e0d451a33f9e1ce93e)
Merged-In: I9994abf3787f5db0edc71ff48d08e549a4b70bf7
Change-Id: I9994abf3787f5db0edc71ff48d08e549a4b70bf7