Refactor libfastboot

This change creates a nice and clean API for issuing
fastboot commands without using the fastboot tool itself.

Test: fastboot tool itself (now using libfastboot2)
on sailfish, walleye, and other devices.
Test: flash bootloader bootloader.img
Test: flash radio radio.img
Test: -w update img.zip
Test: Manually getvar and reboot commands.

Bug: 111126621
Change-Id: I0022536b204ce0c5ad8329367fd522fa3c57877d
diff --git a/fastboot/fastboot_test.cpp b/fastboot/fastboot_test.cpp
index 1681427..43201fa 100644
--- a/fastboot/fastboot_test.cpp
+++ b/fastboot/fastboot_test.cpp
@@ -14,12 +14,12 @@
  * limitations under the License.
  */
 
-#include "fastboot.h"
+#include "engine.h"
 
 #include <gtest/gtest.h>
 
 TEST(FastBoot, ParseOsPatchLevel) {
-    FastBoot fb;
+    FastBootTool fb;
     boot_img_hdr_v1 hdr;
 
     hdr = {};
@@ -34,7 +34,7 @@
 }
 
 TEST(FastBoot, ParseOsVersion) {
-    FastBoot fb;
+    FastBootTool fb;
     boot_img_hdr_v1 hdr;
 
     hdr = {};