Initial support for proposed android.net.lowpan

Android.mk

core/res/AndroidManifest.xml

lowpan/Android.mk

...an/java/android/net/lowpan/ILowpanEnergyScanCallback.aidl

lowpan/java/android/net/lowpan/ILowpanInterface.aidl

lowpan/java/android/net/lowpan/ILowpanInterfaceListener.aidl

lowpan/java/android/net/lowpan/ILowpanManager.aidl

lowpan/java/android/net/lowpan/ILowpanManagerListener.aidl

lowpan/java/android/net/lowpan/ILowpanNetScanCallback.aidl

lowpan/java/android/net/lowpan/LowpanBeaconInfo.java

lowpan/java/android/net/lowpan/LowpanChannelInfo.java

...n/java/android/net/lowpan/LowpanCommissioningSession.java

lowpan/java/android/net/lowpan/LowpanCredential.java

lowpan/java/android/net/lowpan/LowpanEnergyScanResult.java

lowpan/java/android/net/lowpan/LowpanException.java

lowpan/java/android/net/lowpan/LowpanIdentity.java

lowpan/java/android/net/lowpan/LowpanInterface.java

lowpan/java/android/net/lowpan/LowpanManager.java

lowpan/java/android/net/lowpan/LowpanProperties.java

lowpan/java/android/net/lowpan/LowpanProperty.java