Update firebase-firestore/api.txt based on recent changes (#751)
Update firebase-firestore/api.txt based on recent changes (#751)

Used ./gradlew :firebase-firestore:generateApiTxtFile.

These methods are scheduled to become public in the next release.
firebase/firebase-android-sdk,firebase/firebase-android-sdk,firebase/firebase-android-sdk,firebase/firebase-android-sdk,firebase/firebase-android-sdk,firebase/firebase-android-sdk,firebase/firebase-android-sdk,firebase/firebase-android-sdk