Fix theming on Forgot your password work challegne screen

Test: manually tested, screenshots in bug
Bug: 286397998
Change-Id: Iaa9d83fb5c8a2f7df7bf43d224420b767e6c75fc

src/com/android/settings/password/ForgotPasswordActivity.java

@@ -50,6 +50,7 @@ public class ForgotPasswordActivity extends Activity {
             finish();
             return;
         }
+        ThemeHelper.trySetDynamicColor(this);
         setContentView(R.layout.forgot_password_activity);
 
         DevicePolicyManager devicePolicyManager = getSystemService(DevicePolicyManager.class);