[Fuchsia] Specify the target API level in pm_tool.gni (#35132)
[Fuchsia] Specify the target API level in pm_tool.gni (#35132)

Bug: fxb/105705
flutter/engine,flutter/engine,flutter/engine,flutter/engine,rmacnak-google/engine,rmacnak-google/engine,chinmaygarde/flutter_engine,flutter/engine,flutter/engine,rmacnak-google/engine,chinmaygarde/flutter_engine,rmacnak-google/engine,chinmaygarde/flutter_engine,chinmaygarde/flutter_engine,chinmaygarde/flutter_engine,flutter/engine,rmacnak-google/engine,rmacnak-google/engine,chinmaygarde/flutter_engine,chinmaygarde/flutter_engine,rmacnak-google/engine,flutter/engine