[Mono.Android] Bind AccessibilityNodeInfo.AddAction (AccessibilityAction action)

[jpobst]

Fixes: #5368

The class AccessibilityNodeInfo has the following methods:

// Added in API-14, deprecated in API-21
public void addAction (int action)

// Added in API-21
public void addAction (AccessibilityNodeInfo.AccessibilityAction action)

We are converting the int action to an enum using methodmap.csv:

0, android.view.accessibility, AccessibilityNodeInfo, addAction, action, Android.Views.Accessibility.Action

However this mechanism does not specify parameter types, so both methods are getting their parameter enum-ified:

public void AddAction (Android.Views.Accessibility.Action action)
public void AddAction (Android.Views.Accessibility.Action action)

This isn't allowed, so we disabled binding the new overload to allow Mono.Android to build.

In order to properly bind the new overload, this commit removes the line from methodmap.csv and adds the specification directly to metadata, where the path can be made more specific to only affect a single method, allowing the new method to be bound with its original parameter type.

public void AddAction (Android.Views.Accessibility.Action action)
public void AddAction (AccessibilityNodeInfo.AccessibilityAction action)