Create utils module, move Log class there

BuildConfig class is now only created in the utils module

client/android/utils/src/main/kotlin/Log.kt

@@ -0,0 +1,72 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.amnezia.vpn
+
+import android.content.Context
+import java.io.File
+import java.time.LocalDateTime
+import android.util.Log as nativeLog
+
+/*
+ * Drop in replacement for android.util.Log 
+ * Also stores a copy of all logs in tmp/amnezia_daemon_logs.txt
+*/
+class Log {
+    val LOG_MAX_FILE_SIZE = 204800
+    private var file: File
+    private constructor(context: Context) {
+        val tempDIR = context.cacheDir
+        file = File(tempDIR, "amnezia_daemon_logs.txt")
+        if (file.length() > LOG_MAX_FILE_SIZE) {
+            file.writeText("")
+        }
+    }
+
+    companion object {
+        var instance: Log? = null
+        fun init(ctx: Context) {
+            if (instance == null) {
+                instance = Log(ctx)
+            }
+        }
+        fun i(tag: String, message: String) {
+            instance?.write("[info] - ($tag) - $message")
+            if (!BuildConfig.DEBUG) { return; }
+            nativeLog.i(tag, message)
+        }
+        fun v(tag: String, message: String) {
+            instance?.write("($tag) - $message")
+            if (!BuildConfig.DEBUG) { return; }
+            nativeLog.v(tag, message)
+        }
+        fun e(tag: String, message: String) {
+            instance?.write("[error] - ($tag) - $message")
+            if (!BuildConfig.DEBUG) { return; }
+            nativeLog.e(tag, message)
+        }
+        // Only Prints && Logs when in debug, noop in release.
+        fun sensitive(tag: String, message: String?) {
+            if (!BuildConfig.DEBUG) { return; }
+            if (message == null) { return; }
+            e(tag, message)
+        }
+
+        fun getContent(): String? {
+            return try {
+                instance?.file?.readText()
+            } catch (e: Exception) {
+                "=== Failed to read Daemon Logs === \n ${e.localizedMessage} "
+            }
+        }
+
+        fun clearFile() {
+            instance?.file?.writeText("")
+        }
+    }
+    private fun write(message: String) {
+        //LocalDateTime.now()
+        //file.appendText("[${LocalDateTime.now()}] $message  \n")
+    }
+}