Add device/generic/uml project

Bug: 62803036
Test: repo sync device/generic/uml
Change-Id: I514a3b3e4f35412eb7d910dad850145858b369b6
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>

default.xml

@@ -50,6 +50,7 @@
   <project path="device/generic/mini-emulator-x86" name="device/generic/mini-emulator-x86" groups="pdk" />
   <project path="device/generic/mini-emulator-x86_64" name="device/generic/mini-emulator-x86_64" groups="pdk" />
   <project path="device/generic/qemu" name="device/generic/qemu" groups="pdk" />
+  <project path="device/generic/uml" name="device/generic/uml" groups="device,pdk" />
   <project path="device/generic/x86" name="device/generic/x86" groups="pdk" />
   <project path="device/generic/x86_64" name="device/generic/x86_64" groups="pdk" />
   <project path="device/google/accessory/arduino" name="device/google/accessory/arduino" groups="device,pdk" />