More descriptive content description for quick settings toggle.

                    android:layout_width="wrap_content"

                    android:layout_height="wrap_content"

                    android:src="@drawable/ic_sysbar_quicksettings"

                    android:contentDescription="@string/accessibility_settings_button"

                    android:contentDescription="@string/accessibility_desc_quick_settings"

                    />

                <ImageView