FrameworksWifiApiTests: build against framework-wifi

Give Wifi API unit tests access to @hide APIs
in framework-wifi.

Bug: 146513037
Test: atest FrameworksWifiApiTests
Change-Id: I6755d75e3556bf940c79a2105af5cbc5f3def147

wifi/tests/Android.bp

@@ -37,6 +37,8 @@ jacoco_include = ["android.net.wifi.*"]
 android_test {
     name: "FrameworksWifiApiTests",
 
+    defaults: ["framework-wifi-test-defaults"],
+
     srcs: ["**/*.java"],
 
     jacoco: {
@@ -59,7 +61,6 @@ android_test {
         "android.test.base",
     ],
 
-    platform_apis: true,
     test_suites: [
         "device-tests",
         "mts",