Move UI hosting and menu infrastructure to android-ui-common

[MattiasBuelens]

Summary

Moves the layout-independent parts of UIController from :ui to :ui-common. A future TV renderer can then reuse them without depending on :ui or Material3. The package stays com.theoplayer.android.ui and behavior is unchanged.

Moved to :ui-common:

• MenuScope.kt: MenuContent and MenuScope. The Material3 MenuScope.Menu(...) composable stays in :ui.
• UIControllerScope.kt: UIControllerScope and UIControllerScopeImpl. The impl holds the menu stack, the lazy Player and activityInPipMode. It was private and is now public + @InternalUiApi.
• PlayerContainer.kt: PlayerContainer hosts the THEOplayerView and the controls' ComposeView inside the SDK's UI container. It still uses DisposeOnLifecycleDestroyed and calls disposeComposition() in onDispose. It was private and is now public + @InternalUiApi.
• THEOplayerViewLifecycle.kt: rememberTHEOplayerView(config) (public, as before) and its preview-safe context wrappers. rememberTHEOplayerViewInternal and setupTHEOplayerView were internal and are now public + @InternalUiApi.

:ui-common now depends on lifecycle-runtime-compose and compose-foundation, but still not on Material3.

The UIController overloads, UIControllerImpl, rememberPlayer, Menu and THEOplayerTheme stay in :ui.

Link to Devin session: https://dolby.devinenterprise.com/sessions/6307f9268b9b47fbab4169cde6216af1
Open in Devin Desktop: https://dolby.devinenterprise.com/desktop/session/6307f9268b9b47fbab4169cde6216af1?variant=devin
Requested by: @MattiasBuelens

[devin-ai-integration]

I'll fix CI failures and address comments from users with write access. I'll skip comments containing "(aside)".

• Disable automatic comment, CI, and merge conflict monitoring