feat(nova): modernize session glass menus

[papi-ux]

Summary

• Adds shared Nova sheet and alert chrome for session surfaces.
• Replaces the legacy in-stream GameMenu AlertDialog list with Nova glass bottom-sheet rows.
• Makes the verbose session progress overlay the startup owner, including cleanup for the no-AVC fatal path.
• Adds stateful D-pad focused and pressed feedback for Nova sheet action rows.

Test Plan

• PASS: ./gradlew testRootDebugUnitTest --tests com.papi.nova.ui.NovaThemeResourcesTest --tests com.papi.nova.ui.NovaStreamOverlayUiStateTest
• PASS: ./gradlew assembleRootDebug
• PASS: git diff --cached --check and git diff --check
• PASS: added-line static scan hits 0
• PASS: Retroid Pocket 6 root debug install and Library launch smoke; NovaLibraryActivity focused and Nova loaded 19 games

Notes

• Clean-room branch extracted from origin/master to avoid unrelated dirty master changes.
• Final independent reviewer returned passed=true with no security concerns or logic errors.
• No merge requested.