Use TextViewCompat to so API <23 handle setTextAppearance correctly (#910)

Xamarin.Forms.Platform.Android/Cells/BaseCellView.cs

@@ -10,6 +10,7 @@ using AView = Android.Views.View;
 using AColor = Android.Graphics.Color;
 using AColorDraw = Android.Graphics.Drawables.ColorDrawable;
 using Xamarin.Forms.Internals;
+using Android.Support.V4.Widget;
 
 namespace Xamarin.Forms.Platform.Android
 {
@@ -57,7 +58,7 @@ namespace Xamarin.Forms.Platform.Android
 			_mainText.SetSingleLine(true);
 			_mainText.Ellipsize = TextUtils.TruncateAt.End;
 			_mainText.SetPadding((int)context.ToPixels(15), padding, padding, padding);
-			_mainText.SetTextAppearanceCompat(context, global::Android.Resource.Style.TextAppearanceSmall);
+			TextViewCompat.SetTextAppearance(_mainText, global::Android.Resource.Style.TextAppearanceSmall);
 
 			using (var lp = new LayoutParams(ViewGroup.LayoutParams.MatchParent, ViewGroup.LayoutParams.WrapContent))
 				textLayout.AddView(_mainText, lp);
@@ -67,7 +68,7 @@ namespace Xamarin.Forms.Platform.Android
 			_detailText.Ellipsize = TextUtils.TruncateAt.End;
 			_detailText.SetPadding((int)context.ToPixels(15), padding, padding, padding);
 			_detailText.Visibility = ViewStates.Gone;
-			_detailText.SetTextAppearanceCompat(context, global::Android.Resource.Style.TextAppearanceSmall);
+			TextViewCompat.SetTextAppearance(_detailText, global::Android.Resource.Style.TextAppearanceSmall);
 
 			using (var lp = new LayoutParams(ViewGroup.LayoutParams.MatchParent, ViewGroup.LayoutParams.WrapContent))
 				textLayout.AddView(_detailText, lp);

Xamarin.Forms.Platform.Android/Cells/EntryCellView.cs

@@ -1,5 +1,6 @@
 using System;
 using Android.Content;
+using Android.Support.V4.Widget;
 using Android.Text;
 using Android.Views;
 using Android.Views.InputMethods;
@@ -29,7 +30,7 @@ namespace Xamarin.Forms.Platform.Android
 			SetPadding((int)context.ToPixels(15), padding, padding, padding);
 
 			_label = new TextView(context);
-			_label.SetTextAppearanceCompat(context, global::Android.Resource.Style.TextAppearanceSmall);
+			TextViewCompat.SetTextAppearance(_label, global::Android.Resource.Style.TextAppearanceSmall);
 
 			var layoutParams = new LayoutParams(ViewGroup.LayoutParams.WrapContent, ViewGroup.LayoutParams.WrapContent) { Gravity = GravityFlags.CenterVertical };
 			using (layoutParams)

Xamarin.Forms.Platform.Android/TextViewExtensions.cs

@@ -1,21 +0,0 @@
-using Android.Content;
-using Android.OS;
-using Android.Widget;
-
-namespace Xamarin.Forms.Platform.Android
-{
-	internal static class TextViewExtensions
-	{
-		public static void SetTextAppearanceCompat(this TextView textView, Context context, int resId)
-		{
-			if ((int)Build.VERSION.SdkInt < 23)
-			{
-#pragma warning disable 618 // Using older version of SetTextAppearance for compatibility with API 15-22
-				textView.SetTextAppearance(context, resId);
-#pragma warning restore 618
-			}
-			else
-				textView.SetTextAppearance(resId);
-		}
-	}
-}

Xamarin.Forms.Platform.Android/Xamarin.Forms.Platform.Android.csproj

@@ -192,7 +192,6 @@
     <Compile Include="Renderers\ToolbarImageButton.cs" />
     <Compile Include="Renderers\ViewGroupExtensions.cs" />
     <Compile Include="TapGestureHandler.cs" />
-    <Compile Include="TextViewExtensions.cs" />
     <Compile Include="TextColorSwitcher.cs" />
     <Compile Include="ViewInitializedEventArgs.cs" />
     <Compile Include="VisualElementChangedEventArgs.cs" />