feat(android): 在Android 端实现支付。

android/build.gradle

@@ -73,6 +73,10 @@ repositories {
 dependencies {
     //noinspection GradleDynamicVersion
     implementation 'com.facebook.react:react-native:+'  // From node_modules
+
+    // 支付宝 SDK AAR 包所需的配置
+    // implementation (name: 'alipaySdk-15.7.7-20200702160044', ext: 'aar')
+    implementation fileTree(dir: "libs", include: ["*.aar"])
 }
 
 def configureReactNativePom(def pom) {