Have MatDrawer extend CdkScrollable

[sjlskyward]

Feature Description

Heavy related to #9136. Since .mat-drawer-inner-container is generated, cdkScrollable cannot be added.By extending CdkScrollable would make MatDrawer behave like MatDrawerContent, which already extends CdkScrollable

Use Case

Subscribe to scroll events and manage scroll behavior of MatDrawer; this would allow MatDrawerContent to respond dynamically to scroll events on MatDrawer, and vice versa.

[devversion]

Thanks for this issue. Could you please clarify the use-case (i.e. providing something concrete) for having CdkScrollable on the drawer itself? Couldn't you wrap the drawer yourself with cdkScrollable if needed? (i.e. if a menu or tooltip is used)

[devversion]

I chatted with @crisbeto about this. Seems like a good use-case that tooltips/menu can be used in the drawer. Wrapping the drawer manually should definitely work, but it's not really convenient and this should work out of the box.