Modify Tracking Protection configuration

Bug 40020: Disable third-party cookies

Bug 40024: Disable tracking protection by default

components/concept/engine/src/main/java/mozilla/components/concept/engine/EngineSession.kt

@@ -9,6 +9,7 @@ import android.graphics.Bitmap
 import androidx.annotation.CallSuper
 import mozilla.components.concept.engine.EngineSession.TrackingProtectionPolicy.CookiePolicy.ACCEPT_ALL
 import mozilla.components.concept.engine.EngineSession.TrackingProtectionPolicy.CookiePolicy.ACCEPT_NON_TRACKERS
+import mozilla.components.concept.engine.EngineSession.TrackingProtectionPolicy.CookiePolicy.ACCEPT_ONLY_FIRST_PARTY
 import mozilla.components.concept.engine.content.blocking.Tracker
 import mozilla.components.concept.engine.history.HistoryItem
 import mozilla.components.concept.engine.manifest.WebAppManifest
@@ -376,7 +377,9 @@ abstract class EngineSession(
         companion object {
             fun none() = TrackingProtectionPolicy(
                 trackingCategories = arrayOf(TrackingCategory.NONE),
-                cookiePolicy = ACCEPT_ALL
+                useForPrivateSessions = false,
+                useForRegularSessions = false,
+                cookiePolicy = ACCEPT_ONLY_FIRST_PARTY
             )
 
             /**