Adding a flag for enabling new haptic components in the brightness

slider.

Test: compiles
Bug: 295932558
Change-Id: I7680d22243b64c5e97617aecd1acf76abd77caf9

packages/SystemUI/src/com/android/systemui/flags/Flags.kt

@@ -774,4 +774,8 @@ object Flags {
     /** Enable the share wifi button in Quick Settings internet dialog. */
     @JvmField
     val SHARE_WIFI_QS_BUTTON = unreleasedFlag("share_wifi_qs_button")
+
+    /** Enable haptic slider component in the brightness slider */
+    @JvmField
+    val HAPTIC_BRIGHTNESS_SLIDER = unreleasedFlag("haptic_brightness_slider")
 }