Revert "[Mfill Android] Improve announcement for keyboard accessory"

This reverts commit 20a13e9a.

Reason for revert: The string is not a good choice. Landing a second
CL will make merging really hard. Therefore, Undo this CL and redo
it with a proper text.

Original change's description:
> [Mfill Android] Improve announcement for keyboard accessory
> 
> The keyboard accessory was still using the old announcement. It would
> shout "Passwords available" which isn't wrong since passwords fallbacks
> are available but it is very unprecise, incomplete and misleading if the
> accessory is filled with Address autofill suggestion.
> 
> Bug: 969202
> Change-Id: I5792ff1479b361344d976b3036bec7b46cdf5638
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1793082
> Reviewed-by: Ioana Pandele <ioanap@chromium.org>
> Commit-Queue: Friedrich [CET] <fhorschig@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#695079}

TBR=fhorschig@chromium.org,ioanap@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 969202
Change-Id: I70bd861c012d0d67a4f6ca6529079b8597e8c84c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1807237Reviewed-by: Friedrich [CET] <fhorschig@chromium.org>
Commit-Queue: Friedrich [CET] <fhorschig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#697544}

chrome/android/features/keyboard_accessory/internal/java/res/layout/keyboard_accessory_modern.xml

@@ -8,7 +8,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/keyboard_accessory"
     android:layout_gravity="start|bottom"
-    android:contentDescription="@string/autofill_keyboard_accessory_modern_content_description"
+    android:contentDescription="@string/autofill_keyboard_accessory_content_description"
     android:scrollbars="none"
     android:visibility="gone"
     android:orientation="vertical"

chrome/android/features/keyboard_accessory/internal/java/strings/android_keyboard_accessory_strings.grd

@@ -103,12 +103,9 @@
   </translations>
   <release allow_pseudo="false" seq="1">
     <messages fallback_to_english="true">
-      <message name="IDS_AUTOFILL_KEYBOARD_ACCESSORY_CONTENT_DESCRIPTION" desc="The text announced by the screen reader when the password suggestions are shown.">
+      <message name="IDS_AUTOFILL_KEYBOARD_ACCESSORY_CONTENT_DESCRIPTION" desc="The text announced by the screen reader when the autofill suggestions are shown.">
         Passwords available
       </message>
-      <message name="IDS_AUTOFILL_KEYBOARD_ACCESSORY_MODERN_CONTENT_DESCRIPTION" desc="The text announced by the screen reader when the autofill suggestions and fallbacks are shown.">
-        Filling suggestions available in keyboard accessory
-      </message>
       <message name="IDS_KEYBOARD_ACCESSORY_SHEET_HIDE" desc="Description for the active icon button that closes an accessory sheet and brings back the keyboard.">
           Show keyboard
       </message>

chrome/android/features/keyboard_accessory/internal/java/strings/android_keyboard_accessory_strings_grd/IDS_AUTOFILL_KEYBOARD_ACCESSORY_MODERN_CONTENT_DESCRIPTION.png.sha1

-d943c1c4c060f60baed75b91d2e9273302ea7f5c
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