Update webview_public_framework_jar to N-MR1.

Adding frameworks jar build from the android-7.1.1_r28 tag
in AOSP.

Bug:707823

Change-Id: Ifbe2c91aa1b495b0959b5de026bc9fd690474b12
Reviewed-on: https://chromium-review.googlesource.com/466631
Reviewed-by: John Budorick <jbudorick@chromium.org>
Reviewed-by: Selim Gurun <sgurun@chromium.org>
Commit-Queue: Michael Case <mikecase@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#461605}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: a2b501b65e0987b4f2a23561a4906eb02f955a40

config/android/config.gni

@@ -87,7 +87,7 @@ if (is_android) {
   }
 
   webview_public_framework_jar =
-      "//third_party/android_platform/webview/frameworks_7.0.0_r1.jar"
+      "//third_party/android_platform/webview/frameworks_7.1.1_r28.jar"
   if (!defined(webview_framework_jar)) {
     webview_framework_jar = webview_public_framework_jar
   }