* Firebase Installations: Instance ID now uses FIS under the hood. (#3398)
* Fix merge errors
* Use modular import for FIRInstanceID_Private.h
* Use modular imports for FirebaseInstanceID.h (#3509)
* Changes missing during the fix.
* Changes missing during merge.
* Fix header import.
* ./scripts/style.sh
* Fix FCM tests. (#3888)
* Fix IID FCM token check.
* FirebaseInstallation: merge master into FIS integration branch (#4076)
* Fix IID FCM token check.
* Unused constant deleted.
* FCM tests: fix bad merge.
* Remote Config test app: use local IID and FIS. (#4089)
* token request should pass through if token is not fresh (#4104)
* Merge errors fix.
* IID with FIS: send FIS auth token with IID token request (#4152)
* FIRInstanceIDTokenOperation: add FIS auth token to the IID token request.
* IID tests: don't use FIS private headers.
* IID: indication of compatibility with FIS (#4262)
* FIS: IID incompatible version exception.
* FirebaseInstallations.podspec: set preprocessor flags based on env vars.
* FIS Travis: set required env vars
* /scripts/style.sh
* IID: method to indicate FIS usege added.
* FIS: FIRInstantiationTimingEagerInDefaultApp
* FIS: FIRInstantiationTimingAlwaysEager
* IID: make compatibility method static.
* Make -[FIRInstanceID appInstanceID:] safe to be called from any thread (#4482)
* IID: use a cached value of FID for -[FIRInstanceID appInstanceID:]
* TODO comment
* TODO updated
* FirebaseInstallations: prepare IID with FIS dependency for release (#4522)
* Bump FIrebaseInstallations to 1.0.0
* Travis: remove mm/fis-integration-master branch
* Travis: if_changed script updated to reflect IID dependency on FIS.
* Revert "Travis: remove mm/fis-integration-master branch"
This reverts commit 534dff990a.
* Travis: remove mm/fis-integration-master branch (#4526)
* Formatting and spelling.
* Firebase example proj: pod deintegrate
Co-authored-by: Chen Liang <chliang@google.com>
* FIS: IID incompatible version exception.
* FirebaseInstallations.podspec: set preprocessor flags based on env vars.
* FIS Travis: set required env vars
* /scripts/style.sh
* FIS: FIRInstantiationTimingEagerInDefaultApp
* FIS: FIRInstantiationTimingAlwaysEager
