wifi: add test target/directory for unit testing WiFi framework APIs

The existing tests for the WiFi frameworks API android.net.wifi are
copied from frameworks/opt/wifi/tests, and will be removed in
frameworks/opt/wifi/tests.

Bug: 31745421
Change-Id: I789e983bc7dd02b6c3fa6a982ca671347912be0f
Test: frameworks/base/wifi/runtests.sh
diff --git a/wifi/tests/runtests.sh b/wifi/tests/runtests.sh
new file mode 100755
index 0000000..ebcc2a2
--- /dev/null
+++ b/wifi/tests/runtests.sh
@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+if [ -z $ANDROID_BUILD_TOP ]; then
+  echo "You need to source and lunch before you can use this script"
+  exit 1
+fi
+
+echo "Running tests"
+
+set -e # fail early
+
+echo "+ mmma -j32 $ANDROID_BUILD_TOP/frameworks/base/wifi/tests"
+# NOTE Don't actually run the command above since this shell doesn't inherit functions from the
+#      caller.
+make -j32 -C $ANDROID_BUILD_TOP -f build/core/main.mk MODULES-IN-frameworks-base-wifi-tests
+
+set -x # print commands
+
+adb root
+adb wait-for-device
+
+adb install -r -g "$OUT/data/app/FrameworksWifiApiTests/FrameworksWifiApiTests.apk"
+
+adb shell am instrument -w "$@" 'android.net.wifi.test/android.support.test.runner.AndroidJUnitRunner'