[System] Add handling code for internal APIs

Power related EventArgs classes were used at internal APIs
in Power.cs module.
These classes and all properties(attributes) should be
treated as internal API code.
Thus, this patch is necessary.

Signed-off-by: Yunhee Seo <[email protected]>

src/Tizen.System/Device/DeviceEventArgs.cs

@@ -15,6 +15,7 @@
 */
 
 using System;
+using System.ComponentModel;
 
 namespace Tizen.System
 {
@@ -94,25 +95,30 @@ internal LedBrightnessChangedEventArgs() {}
     /// This class contains event arguments for the (PowerState)StateWaitCallback event from the Power class.
     /// </summary>
     /// <since_tizen> 10 </since_tizen>
+    [EditorBrowsable(EditorBrowsableState.Never)]
     public class PowerStateWaitEventArgs : EventArgs
     {
         internal PowerStateWaitEventArgs() {}
         /// <summary>
         /// PrevState indicates reason power state where transition has started
         /// </summary>
+        [EditorBrowsable(EditorBrowsableState.Never)]
         public PowerState PrevState { get; internal set; }
         /// <summary>
         /// NextState indicates power state to be changed by transition
         /// </summary>
+        [EditorBrowsable(EditorBrowsableState.Never)]
         public PowerState NextState { get; internal set; }
         /// <summary>
         /// WaitCallbackId indicates unique id for each callback invocation.
         /// It is used to confirm or cancel about subscribed callback.
         /// </summary>
+        [EditorBrowsable(EditorBrowsableState.Never)]
         public UInt64 WaitCallbackId { get; internal set; }
         /// <summary>
         /// TransitionReason indicates reason for what triggered the transition
         /// </summary>
+        [EditorBrowsable(EditorBrowsableState.Never)]
         public PowerTransitionReason TransitionReason { get; internal set; }
     }
 
@@ -121,21 +127,25 @@ internal PowerStateWaitEventArgs() {}
     /// This class contains event arguments for the (PowerTransientState)StateWaitCallback event from the Power class.
     /// </summary>
     /// <since_tizen> 10 </since_tizen>
+    [EditorBrowsable(EditorBrowsableState.Never)]
     public class PowerTransientStateWaitEventArgs : EventArgs
     {
         internal PowerTransientStateWaitEventArgs() {}
         /// <summary>
         /// TransientState indicates transient state to be changed by the transition
         /// </summary>
+        [EditorBrowsable(EditorBrowsableState.Never)]
         public PowerTransientState TransientState { get; internal set; }
         /// <summary>
         /// WaitCallbackId indicates unique id for each callback invocation.
         /// It is used to confirm or cancel about subscribed callback.
         /// </summary>
+        [EditorBrowsable(EditorBrowsableState.Never)]
         public UInt64 WaitCallbackId { get; internal set; }
         /// <summary>
         /// TransitionReason indicates reason for what triggered the transition
         /// </summary>
+        [EditorBrowsable(EditorBrowsableState.Never)]
         public PowerTransitionReason TransitionReason { get; internal set; }
     }
 
@@ -144,16 +154,19 @@ internal PowerTransientStateWaitEventArgs() {}
     /// This class contains event arguments for the (PowerLock)StateChangedCallback event from the Power class.
     /// </summary>
     /// <since_tizen> 10 </since_tizen>
+    [EditorBrowsable(EditorBrowsableState.Never)]
     public class PowerLockStateChangedEventArgs : EventArgs
     {
         internal PowerLockStateChangedEventArgs() {}
         /// <summary>
         ///  PowerLockType indicates Type of power lock
         /// </summary>
+        [EditorBrowsable(EditorBrowsableState.Never)]
         public PowerLock PowerLockType { get; internal set; }
         /// <summary>
         /// PowerLockState indicates locked or unlocked about power lock type.
         /// </summary>
+        [EditorBrowsable(EditorBrowsableState.Never)]
         public PowerLockState PowerLockState { get; internal set; }
     }
 
@@ -162,17 +175,20 @@ internal PowerLockStateChangedEventArgs() {}
     /// This class contains event arguments for the (PowerState)StateChangeRequestCallback event from the Power class.
     /// </summary>
     /// <since_tizen> 10 </since_tizen>
+    [EditorBrowsable(EditorBrowsableState.Never)]
     public class PowerStateChangeRequestEventArgs : EventArgs
     {
         internal PowerStateChangeRequestEventArgs() {}
         /// <summary>
         /// PowerState indicates state to be changed that was requested.
         /// </summary>
+        [EditorBrowsable(EditorBrowsableState.Never)]
         public PowerState PowerState { get; internal set; }
         /// <summary>
         /// Retval indicates return of change state result from deviced.
         /// If Retval is negative, it means failure, 0 means success.
         /// </summary>
+        [EditorBrowsable(EditorBrowsableState.Never)]
         public int Retval { get; internal set; }
     }
 }