Improve: remove tracking for flavor 'foss'

app/src/foss/java/com/github/kr328/clash/Tracker.kt

@@ -0,0 +1,14 @@
+package com.github.kr328.clash
+
+import android.app.Application
+
+@Suppress("UNUSED_PARAMETER")
+object Tracker {
+    fun initialize(application: Application) {
+        // do nothing
+    }
+
+    fun uploadLogcat(logcat: String) {
+        // do nothing
+    }
+}