Fresh install optimizations

[gthea]

Android SDK

What did you accomplish?

• Added functionality to fetch targeting rules in parallel to factory initialization, in fresh installs (no DB present);
• Added TargetingRulesCache to hold the cached response.
• Added executor in flags and RBS storages to offload DB writes when the number of added or archived elements is greater than 50.
• Removed static initialization of Proxy related class unless the feature is enabled.
• Added static lock for DB existence check to handle concurrent SplitFactoryImpl instantiations.

[sonarqube-pull-requests]

SonarQube Quality Gate

75.8% Coverage on New Code (is less than 80%)

See analysis details on SonarQube