Bump to xamarin-android-api-compatibility/d15-7/dc5f0c2e

Fixes an [ABI break][0] in 72ef39b:

[0]: https://jenkins.mono-project.com/view/Xamarin.Android/job/xamarin-android/877/

	<h3>Type Changed: Microsoft.SqlServer.Server.SqlDataRecord</h3>
	<p>Removed method:</p>
	<pre>
	  <span class='removed removed-method breaking' data-is-breaking>public virtual System.Data.IDataReader GetData (int);</span>
	</pre>

	<h3>Type Changed: System.Data.SqlClient.SqlConnectionStringBuilder</h3>
	<p>Removed property:</p>
	<pre>
	  <span class='removed removed-property breaking' data-is-breaking>public bool IsFixedSize { get; }</span>
	</pre>

	</div> <!-- end type SqlConnectionStringBuilder -->
	<!-- start type SqlParameterCollection --> <div>
	<h3>Type Changed: System.Data.SqlClient.SqlParameterCollection</h3>
	<p>Removed properties:</p>
	<pre>
	  <span class='removed removed-property breaking' data-is-breaking>public bool IsFixedSize { get; }</span>
	  <span class='removed removed-property breaking' data-is-breaking>public bool IsReadOnly { get; }</span>
	  <span class='removed removed-property breaking' data-is-breaking>public bool IsSynchronized { get; }</span>
	</pre>

This doesn't fix the "ABI break"; there is no ABI break of consequence.
This fixes the *reporting* of the ABI break.

See also: xamarin/xamarin-android-api-compatibility@5be4d43