can't build

[sgehrman]

Launching lib/main.dart on Android SDK built for x86 in debug mode...
Note: /home/steve/google/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.12.7+1/android/src/main/java/io/flutter/plugins/firebase/cloudfirestore/CloudFirestorePlugin.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: /home/steve/google/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.12.7+1/android/src/main/java/io/flutter/plugins/firebase/cloudfirestore/CloudFirestorePlugin.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Note: /home/steve/google/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_twitter_login-1.1.0/android/src/main/java/com/roughike/fluttertwitterlogin/fluttertwitterlogin/TwitterLoginPlugin.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
/home/steve/google/flutter/.pub-cache/hosted/pub.dartlang.org/scheduled_notifications-1.0.0/android/src/main/java/dk/kjeldsen/scheduled_notifications/ScheduleNotificationsService.java:50: warning: [deprecation] Builder(Context) in Builder has been deprecated
Notification.Builder builder = new Notification.Builder(
^
/home/steve/google/flutter/.pub-cache/hosted/pub.dartlang.org/scheduled_notifications-1.0.0/android/src/main/java/dk/kjeldsen/scheduled_notifications/ScheduleNotificationsService.java:62: warning: [deprecation] setDefaults(int) in Builder has been deprecated
.setDefaults(
^
/home/steve/google/flutter/.pub-cache/hosted/pub.dartlang.org/scheduled_notifications-1.0.0/android/src/main/java/dk/kjeldsen/scheduled_notifications/ScheduleNotificationsService.java:65: warning: [deprecation] setSound(Uri) in Builder has been deprecated
.setSound(
^
3 warningsGradle task assembleDebug failed with exit code 1
Exited (sigterm)