Rename product_services to system_ext

Update adb, fastboot and mount point

Bug: 134359158
Test: build and check if system_ext.img can be flashed
Change-Id: I6219f72242c5fe42a508008c0b1fd218d74da5b6
diff --git a/fastboot/fastboot.cpp b/fastboot/fastboot.cpp
index c436be3..8923f40 100644
--- a/fastboot/fastboot.cpp
+++ b/fastboot/fastboot.cpp
@@ -144,14 +144,13 @@
     { "dts",      "dt.img",           "dt.sig",       "dts",      true,  ImageType::BootCritical },
     { "odm",      "odm.img",          "odm.sig",      "odm",      true,  ImageType::Normal },
     { "product",  "product.img",      "product.sig",  "product",  true,  ImageType::Normal },
-    { "product_services",
-                  "product_services.img",
-                                      "product_services.sig",
-                                                      "product_services",
-                                                                  true,  ImageType::Normal },
     { "recovery", "recovery.img",     "recovery.sig", "recovery", true,  ImageType::BootCritical },
     { "super",    "super.img",        "super.sig",    "super",    true,  ImageType::Extra },
     { "system",   "system.img",       "system.sig",   "system",   false, ImageType::Normal },
+    { "system_ext",
+                  "system_ext.img",   "system_ext.sig",
+                                                      "system_ext",
+                                                                  true,  ImageType::Normal },
     { nullptr,    "system_other.img", "system.sig",   "system",   true,  ImageType::Normal },
     { "userdata", "userdata.img",     "userdata.sig", "userdata", true,  ImageType::Extra },
     { "vbmeta",   "vbmeta.img",       "vbmeta.sig",   "vbmeta",   true,  ImageType::BootCritical },