fix(iptv): reload EPG during manual playlist refresh

[Saelon600]

Summary

• Makes Settings → Refresh IPTV force both playlist and EPG network reloads.
• Allows EPG source discovery/network fetch during an explicit refresh instead of purging guide data and then performing a cache-only load.
• Keeps automatic/non-forced settings loads cache-friendly and defers broad network EPG work.

Why

The refresh action could finish very quickly while leaving the guide empty or stuck on “Guide pending”, because it forced the playlist but explicitly disabled EPG reload/network fetching.

Testing

• IptvRefreshPolicyTest
  • manual refresh forces playlist, EPG, and network EPG flags
  • automatic load keeps those flags disabled
• ./gradlew :app:compileSideloadDebugKotlin
• ./gradlew :app:testSideloadDebugUnitTest
• git diff --check
• Manual phone verification on the fork build: EPG populated noticeably faster after refresh.

Behavior note

An explicit manual refresh may take longer than before because it now performs the EPG work the UI promises. Normal startup remains cache-first.

Scope

Android Settings IPTV refresh orchestration only. No startup cache policy, backend, player interaction, catalog, or app version changes.