Merge "Update a11y label for unlock icon on lock screen." into tm-qpr-dev

    <!-- Content description of the QR Code scanner for accessibility (not shown on the screen). [CHAR LIMIT=NONE] -->

    <string name="accessibility_qr_code_scanner_button">QR Code Scanner</string>

    <!-- Content description of the unlock button for accessibility (not shown on the screen). [CHAR LIMIT=NONE] -->

    <string name="accessibility_unlock_button">Unlock</string>

    <string name="accessibility_unlock_button">Unlocked</string>

    <!-- Content description of the lock icon for accessibility (not shown on the screen). [CHAR LIMIT=NONE] -->

    <string name="accessibility_lock_icon">Device locked</string>

    <!-- Content description hint of the unlock button when fingerprint is on (not shown on the screen). [CHAR LIMIT=NONE] -->