File plugin breaks android platform build w/ 'error: cannot find symbol'

Error: /private/var/folders/nd/5vd2nqsn3tlc6kljds0c95200000gp/T/tmp-21847jTje5M03ERRh/platforms/android/gradlew: Command failed with exit code 1 Error output:
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
/private/var/folders/nd/5vd2nqsn3tlc6kljds0c95200000gp/T/tmp-21847jTje5M03ERRh/platforms/android/src/org/apache/cordova/file/LocalFilesystem.java:387: error: cannot find symbol
            rawData = data.getBytes(Charset.defaultCharset());
                                    ^
  symbol:   variable Charset
  location: class LocalFilesystem
Note: /private/var/folders/nd/5vd2nqsn3tlc6kljds0c95200000gp/T/tmp-21847jTje5M03ERRh/platforms/android/src/org/apache/cordova/file/DirectoryManager.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: /private/var/folders/nd/5vd2nqsn3tlc6kljds0c95200000gp/T/tmp-21847jTje5M03ERRh/platforms/android/src/org/apache/cordova/file/AssetFilesystem.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.