Fixing Purge Bug
Merge branch 'android' of https://github.com/Azure/azure-mobile-services into android

Merge main changes
Fix Purge should throw instead of doing a push #409

Fix Issue #409
Fix Issue #424

Fixed: [Android] Sqlite insert performance on pull can be significantly
improved
Fixing Bug #441

Unit test are pending.
Fix Bug #441

Unit test are done
Change Api Name
Review fixes
Migration to Android Studio
Fix repeated permissions
Merge pull request #459 from marianosz/androidStudioMigration

Android studio migration