test(manifest): fix ManifestRulesTest permission-list drift

POST_PROMOTED_NOTIFICATIONS was added to AndroidManifest.xml for the
timer's Live Update chip but never added to this test's expected
permission list — pre-existing drift, unrelated to M10, caught while
touching this file for settings work.

app/src/test/java/de/jeanlucmakiola/clockula/ManifestRulesTest.kt

@@ -108,6 +108,10 @@ class ManifestRulesTest {
             "android.permission.RECEIVE_BOOT_COMPLETED",
             "android.permission.USE_FULL_SCREEN_INTENT",
             "android.permission.POST_NOTIFICATIONS",
+            // Already present for the timer's Live Update chip; not added by
+            // M10, which — per docs/PLAN.md's amended §1 #2 — adds no permission
+            // of its own for settings, backup, self-check or the widgets.
+            "android.permission.POST_PROMOTED_NOTIFICATIONS",
             "android.permission.FOREGROUND_SERVICE",
             "android.permission.FOREGROUND_SERVICE_SYSTEM_EXEMPTED",
             "android.permission.FOREGROUND_SERVICE_SPECIAL_USE",