Anchored adaptive banners in LinearLayout structure

[Merian q]

Hello,

I am updating the normal(smart) admob banners for admob Anchored adaptive banners, I am following the example of google but I have several doubts.

I use LinearLayout as a general structure and not RelativeLayout like the google example.

When using the code to display the banner, it underlines two lines.

Code example:
<FrameLayout
 android:id="@+id/ad_view_container"
  android:layout_width="match_parent"
 android:layout_height="wrap_content"
  android:layout_centerInParent="true"
 android:layout_alignParentBottom="true" />

Yellow underline in android studios  (code):

android:layout_centerInParent="true"

Message or warning: Invalid layout param in a LinearLayout: layout_centerInParent

android:layout_alignParentBottom="true"

Message or warning: Invalid layout param in a LinearLayout: layout_alignParentBottom

In the application the test ads are displayed well and work. But I don't like the messages of the underlined code (to avoid problems)

What would be the solution if my main structure is LinearLayout?

---------

Another option:
Could I use this code for the Anchored adaptive banners?

<LinearLayout
 android:id="@+id/ad_view_container"
 android:orientation="vertical"
 android:gravity="bottom"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"> </LinearLayout>

or does it have to be FrameLayout..?

Thank you for your answers