New Serial Manager API:

SerialManager: provides access to serial ports
SerialPort: for reading and writing data to and from serial ports

IO with both array based and direct ByteBuffers is supported.

Accessing serial ports requires android.permission.SERIAL_PORT permission

Each platform must configure list of supported serial ports in the
config_serialPorts resource overlay
(this is needed to prevent apps from accidentally accessing the bluetooth
or other system UARTs).

In addition, the platform uevent.rc file must set the owner to the
/dev/tty* files to "system" so the framework can access the port.

Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 1199cf7..68c919e 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -1514,6 +1514,13 @@
         android:description="@string/permdesc_bindPackageVerifier"
         android:protectionLevel="signature" />
 
+    <!-- Allows applications to access serial ports via the SerialManager.
+         @hide -->
+    <permission android:name="android.permission.SERIAL_PORT"
+        android:label="@string/permlab_serialPort"
+        android:description="@string/permdesc_serialPort"
+        android:protectionLevel="normal" />
+
     <!-- The system process is explicitly the only one allowed to launch the
          confirmation UI for full backup/restore -->
     <uses-permission android:name="android.permission.CONFIRM_FULL_BACKUP"/>