Android Support (#166)

1. Add vpnservice tauri plugin for android.
2. add workflow for android.
3. Easytier Core support android, allow set tun fd.

tauri-plugin-vpnservice/guest-js/index.ts

@@ -0,0 +1,35 @@
+import { invoke } from '@tauri-apps/api/core'
+
+export async function ping(value: string): Promise<string | null> {
+  return await invoke<{ value?: string }>('plugin:vpnservice|ping', {
+    payload: {
+      value,
+    },
+  }).then((r) => (r.value ? r.value : null));
+}
+
+export interface InvokeResponse {
+  errorMsg?: string;
+}
+
+export interface StartVpnRequest {
+  ipv4Addr?: string;
+  routes?: string[];
+  dns?: string;
+  disallowedApplications?: string[];
+  mtu?: number;
+}
+
+export async function prepare_vpn(): Promise<InvokeResponse | null> {
+  return await invoke<InvokeResponse>('plugin:vpnservice|prepare_vpn', {})
+}
+
+export async function start_vpn(request: StartVpnRequest): Promise<InvokeResponse | null> {
+  return await invoke<InvokeResponse>('plugin:vpnservice|start_vpn', {
+    ...request,
+  })
+}
+
+export async function stop_vpn(): Promise<InvokeResponse | null> {
+  return await invoke<InvokeResponse>('plugin:vpnservice|stop_vpn', {})
+}