Add string for 'Keep latest note on lock screen' setting

BUG=747157

Change-Id: Ia3aef4d7c88ab53a863ac9a300e288e04dfb0b51
Reviewed-on: https://chromium-review.googlesource.com/580576Reviewed-by: Michael Giuffrida <michaelpg@chromium.org>
Commit-Queue: Toni Barzic <tbarzic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488552}

chrome/app/settings_strings.grdp

@@ -3002,6 +3002,9 @@
     <message name="IDS_SETTINGS_STYLUS_NOTE_TAKING_APP_LOCK_SCREEN_CHECKBOX" desc="Label for a check box that enables note-taking by selected note-taking application when user session is locked (i.e. when lock screen is shown).">
       Enable note-taking from lock screen
     </message>
+    <message name="IDS_SETTINGS_STYLUS_NOTE_TAKING_APP_KEEP_LATEST_NOTE" desc="Label for a check box that, when checked, indicates that the note-taking app should keep the latest note the user took while on the lock screen available to the user whenever the app is launched on the lock screen (i.e. if the active app window is closed, the note should be visible the next time the app is launched).">
+      Keep latest note on lock screen
+    </message>
     <message name="IDS_SETTINGS_STYLUS_NOTE_TAKING_APP_NONE_AVAILABLE" desc="Secondary label used when there are no note-taking applications available.">
       None available
     </message>