feat(settings): add remote "Set time" admin action (#5821)

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

core/testing/src/commonMain/kotlin/org/meshtastic/core/testing/FakeRadioController.kt

@@ -123,6 +123,8 @@ class FakeRadioController :
 
     override suspend fun setCannedMessages(destNum: Int, messages: String) {}
 
+    override suspend fun setTime(destNum: Int, packetId: Int) {}
+
     override suspend fun getOwner(destNum: Int, packetId: Int) {}
 
     override suspend fun getConfig(destNum: Int, configType: Int, packetId: Int) {}