[Android, Crash] Fix for key icon drawable in accessory bar

This CL tries to address the kitkat and earlier crashes due to a
parsing error of a vector graphic by replacing VectorDrawableCompat
with AppCompatResources.

Bug: 856175
Change-Id: I987d930be1164f8c9e33025d733f928d3ac7ff1f
Reviewed-on: https://chromium-review.googlesource.com/1115122Reviewed-by: Bernhard Bauer <bauerb@chromium.org>
Commit-Queue: Friedrich Horschig <fhorschig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570425}

chrome/android/java/src/org/chromium/chrome/browser/autofill/keyboard_accessory/PasswordAccessorySheetCoordinator.java

@@ -6,7 +6,7 @@ package org.chromium.chrome.browser.autofill.keyboard_accessory;
 
 import android.content.Context;
 import android.graphics.drawable.Drawable;
-import android.support.graphics.drawable.VectorDrawableCompat;
+import android.support.v7.content.res.AppCompatResources;
 import android.support.v7.widget.RecyclerView;
 import android.view.View;
 
@@ -46,8 +46,7 @@ public class PasswordAccessorySheetCoordinator {
          */
         public Drawable getIcon(Context context) {
             if (mIcon != null) return mIcon;
-            mIcon = VectorDrawableCompat.create(
-                    context.getResources(), R.drawable.ic_vpn_key_grey, context.getTheme());
+            mIcon = AppCompatResources.getDrawable(context, R.drawable.ic_vpn_key_grey);
             return mIcon;
         }