[alexfoxtm]

Fixes: #191

What this changes:

Android notification settings could be saved without updating visible controls until the user left and reopened the page. Refresh the notification cards when their underlying state changes, including filter mode, per-app switches, and notification access state. Use the existing activity-resume signal for the Notifications page and avoid repeated package-manager lookups when other state changes.

How I tested it:

• Compiled both standard and full debug Kotlin variants at the latest revision.
• On an Android 16 emulator, an earlier revision updated the filter selector, an individual app switch, and all three notification switches immediately without leaving the page. After the package-lookup change, I also checked the filter selector on the emulator.
• The emulator was unpaired; notification delivery to a computer was not tested. Returning from the notification-access Settings screen and the final resume-signal change were not verified on a device. The Android module has no existing tests for this page.