fastboot: Add a mock transport and some driver tests.

Bug: N/A
Test: fastboot_test
Change-Id: I08d8dfedcc7e9dad9ce418e0f3aaf5ac69a3a2a2
diff --git a/fastboot/Android.bp b/fastboot/Android.bp
index 76aaf7b..3c110ee 100644
--- a/fastboot/Android.bp
+++ b/fastboot/Android.bp
@@ -375,6 +375,7 @@
     defaults: ["fastboot_host_defaults"],
 
     srcs: [
+        "fastboot_driver_test.cpp",
         "fastboot_test.cpp",
         "socket_mock.cpp",
         "socket_test.cpp",
@@ -383,7 +384,10 @@
         "udp_test.cpp",
     ],
 
-    static_libs: ["libfastboot"],
+    static_libs: [
+        "libfastboot",
+        "libgmock",
+    ],
 
     target: {
         windows: {