Analyze with fatal infos on both `stable` and `beta` (#962)

tool/flutter_ci_script_shared.sh

@@ -12,11 +12,7 @@ function ci_projects () {
         flutter pub get
 
         # Run the analyzer to find any static analysis issues.
-        if [ "$channel" == 'stable' ]; then
         dart analyze --fatal-infos
-        else
-            dart analyze
-        fi
 
         # Run the formatter on all the dart files to make sure everything's linted.
         dart format --output none --set-exit-if-changed .