Disables show ntp at startup flag on Android

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

@@ -16,6 +16,7 @@ public class BraveCachedFlag extends CachedFlag {
     private static final String INCOGNITO_REAUTHENTICATION_FOR_ANDROID =
             "IncognitoReauthenticationForAndroid";
     private static final String MAGIC_STACK_ANDROID = "MagicStackAndroid";
+    private static final String SHOW_NTP_AT_STARTUP_ANDROID = "ShowNtpAtStartupAndroid";
     private static final String START_SURFACE_ANDROID = "StartSurfaceAndroid";
     private static final String SURFACE_POLISH = "SurfacePolish";
 
@@ -28,6 +29,7 @@ public class BraveCachedFlag extends CachedFlag {
         sFlags.put(ANDROID_TAB_GROUP_STABLE_IDS, false);
         sFlags.put(INCOGNITO_REAUTHENTICATION_FOR_ANDROID, true);
         sFlags.put(MAGIC_STACK_ANDROID, false);
+        sFlags.put(SHOW_NTP_AT_STARTUP_ANDROID, false);
         sFlags.put(START_SURFACE_ANDROID, false);
         sFlags.put(SURFACE_POLISH, false);
     }

chromium_src/chrome/browser/flags/android/chrome_feature_list.cc

@@ -65,6 +65,7 @@ OVERRIDE_FEATURE_DEFAULT_STATES({{
     {tab_groups::kAndroidTabGroupStableIds, base::FEATURE_DISABLED_BY_DEFAULT},
     {kIncognitoReauthenticationForAndroid, base::FEATURE_ENABLED_BY_DEFAULT},
     {kMagicStackAndroid, base::FEATURE_DISABLED_BY_DEFAULT},
+    {kShowNtpAtStartupAndroid, base::FEATURE_DISABLED_BY_DEFAULT},
     {kStartSurfaceAndroid, base::FEATURE_DISABLED_BY_DEFAULT},
     {kSurfacePolish, base::FEATURE_DISABLED_BY_DEFAULT},
     {kAdaptiveButtonInTopToolbarCustomizationV2,