Initiate Flag ID for Region Sampling

This change creates a new integer ID to be used as a flag
for the region sampling feature.

Bug: 202758428
Test: Manual
Change-Id: I7574c8d640081be845eabda949b14934846df789
Merged-In: I645c2a0b4e68d5ec9165a2eb354f6d814acbf596

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

@@ -172,6 +172,10 @@ public class Flags {
     public static final ResourceBooleanFlag MONET =
             new ResourceBooleanFlag(800, R.bool.flag_monet);
 
+    /***************************************/
+    // 801 - region sampling
+    public static final UnreleasedFlag REGION_SAMPLING = new UnreleasedFlag(801);
+
     /***************************************/
     // 900 - media
     public static final BooleanFlag MEDIA_TAP_TO_TRANSFER = new BooleanFlag(900, true);