Enable the BrightLineFalsingManager by default on Q.

Bug: 71762354
Change-Id: Icfc6e21d50e08c34168f504ec64bf654ba6cb6a4
Test: atest SystemUITests
(cherry picked from commit b332588e60b4219c603a546dda8f19619e166783)
diff --git a/packages/SystemUI/src/com/android/systemui/classifier/FalsingManagerProxy.java b/packages/SystemUI/src/com/android/systemui/classifier/FalsingManagerProxy.java
index 3cc8ec9a..69f243c 100644
--- a/packages/SystemUI/src/com/android/systemui/classifier/FalsingManagerProxy.java
+++ b/packages/SystemUI/src/com/android/systemui/classifier/FalsingManagerProxy.java
@@ -91,7 +91,7 @@
     @VisibleForTesting
     public void setupFalsingManager(Context context) {
         boolean brightlineEnabled = DeviceConfig.getBoolean(
-                DeviceConfig.NAMESPACE_SYSTEMUI, BRIGHTLINE_FALSING_MANAGER_ENABLED, false);
+                DeviceConfig.NAMESPACE_SYSTEMUI, BRIGHTLINE_FALSING_MANAGER_ENABLED, true);
         if (!brightlineEnabled) {
             mInternalFalsingManager = new FalsingManagerImpl(context);
         } else {
diff --git a/packages/SystemUI/tests/src/com/android/systemui/classifier/FalsingManagerProxyTest.java b/packages/SystemUI/tests/src/com/android/systemui/classifier/FalsingManagerProxyTest.java
index 329ef1c..7ea6493 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/classifier/FalsingManagerProxyTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/classifier/FalsingManagerProxyTest.java
@@ -56,6 +56,9 @@
         mHandler = new Handler(mTestableLooper.getLooper());
         mDefaultConfigValue = DeviceConfig.getBoolean(DeviceConfig.NAMESPACE_SYSTEMUI,
                 BRIGHTLINE_FALSING_MANAGER_ENABLED, false);
+        // In case it runs on a device where it's been set to true, set it to false by hand.
+        DeviceConfig.setProperty(DeviceConfig.NAMESPACE_SYSTEMUI,
+                BRIGHTLINE_FALSING_MANAGER_ENABLED, "false", false);
     }
 
     @After