CachedFlag now has two different ctors

fixes brave/brave-browser#38524

Related Chromium change:
https://source.chromium.org/chromium/chromium/src/+/d185bd9ea3aa006e8dfc789dce07f3d902886c9a

[Android] Allow CachedFlags to specify test defaults

	This mimics fieldtrial_testing_config.json for CachedFlag in tests.
	It does not affect the flag value in developer builds like
	fieldtrial_testing_config.json does, however.

	Bug: 40239922
	Change-Id: I8b67a6c2feeadd5ce12dcf6d41fe4c2e3e3d240f
	Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5523173

android/javatests/org/chromium/chrome/browser/BytecodeTest.java

@@ -1402,6 +1402,14 @@ public void testConstructorsExistAndMatch() throws Exception {
                         FeatureMap.class,
                         String.class,
                         boolean.class));
+        Assert.assertTrue(
+                constructorsMatch(
+                        "org/chromium/base/cached_flags/CachedFlag",
+                        "org/chromium/base/cached_flags/BraveCachedFlag",
+                        FeatureMap.class,
+                        String.class,
+                        boolean.class,
+                        boolean.class));
 
         Assert.assertTrue(
                 constructorsMatch(

base/android/java/src/org/chromium/base/cached_flags/BraveCachedFlag.java

@@ -31,6 +31,16 @@ public class BraveCachedFlag extends CachedFlag {
     // Will be deleted in bytecode. Variable from the parent class will be used instead.
     private boolean mDefaultValue;
 
+    public BraveCachedFlag(
+            FeatureMap featureMap,
+            String featureName,
+            boolean defaultValue,
+            boolean defaultValueInTests) {
+        super(featureMap, featureName, defaultValue, defaultValueInTests);
+
+        maybeOverrideDefaultValue(featureName, defaultValue);
+    }
+
     public BraveCachedFlag(FeatureMap featureMap, String featureName, boolean defaultValue) {
         super(featureMap, featureName, defaultValue);