https://source.android.com/ 
public interface android.hardware.ISerialManager extends android.os.IInterface
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: android.hardware.ISerialManager
  super_class: java.lang.Object
{
  public abstract java.lang.String[] getSerialPorts();
    descriptor: ()[Ljava/lang/String;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws android.os.RemoteException

  public abstract android.os.ParcelFileDescriptor openSerialPort(java.lang.String);
    descriptor: (Ljava/lang/String;)Landroid/os/ParcelFileDescriptor;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws android.os.RemoteException
    MethodParameters:
      Name  Flags
      name  
}
SourceFile: "ISerialManager.java"
NestMembers:
  android.hardware.ISerialManager$Stub  android.hardware.ISerialManager$Stub$Proxy
InnerClasses:
  public abstract Stub = android.hardware.ISerialManager$Stub of android.hardware.ISerialManager