Merge "Update conversation string" into main

    <string name="notification_channel_summary_low">No sound or vibration</string>

    <!-- [CHAR LIMIT=150] Notification Importance title: low importance level summary -->

    <string name="notification_conversation_summary_low">No sound or vibration and appears lower in conversation section</string>

    <string name="notification_conversation_summary_low">No sound or vibration but still appears in the conversation section</string>

    <!-- [CHAR LIMIT=150] Notification Importance title: normal importance level summary -->

    <string name="notification_channel_summary_default">May ring or vibrate based on device settings</string>