CHANGELOG.md updates for 17.1.4
custom objects (POJOs) by passing a Class<T> instance, e.g.
`snapshot.get("field", CustomType.class)`.
+# 17.1.4
+- [fixed] Fixed a SQLite transaction handling issue that occasionally masked
+ exceptions when Firestore closed a transaction that was never started. For
+ more information, see the issue report in GitHub (https://github.com/firebase/firebase-android-sdk/issues/115).
+- [fixed] Fixed a race condition that caused a `SQLiteDatabaseLockedException`
+ when an app attempted to access the SQLite database from multiple threads.
+
# 17.1.2
- [changed] Changed how the SDK handles locally-updated documents while syncing
those updates with Cloud Firestore servers. This can lead to slight behavior
