android: update revision to r32

Change-Id: I80a4683e2e66f95c51d07be6ec0eb27e7b4436bf

default.xml

@@ -3,7 +3,7 @@
   <remote  name="aosp"
            fetch="https://android.googlesource.com"
            review="https://android-review.googlesource.com/" />
-  <default revision="refs/tags/android-8.1.0_r28"
+  <default revision="refs/tags/android-8.1.0_r32"
            remote="aosp"
            sync-c="true"
            sync-j="12" />
@@ -231,7 +231,6 @@
   <project path="external/libusb" name="platform/external/libusb" groups="pdk" />
   <project path="external/libusb-compat" name="platform/external/libusb-compat" groups="pdk" />
   <project path="external/libvncserver" name="platform/external/libvncserver" groups="pdk" />
-  <project path="external/libvorbis" name="platform/external/libvorbis" groups="pdk" />
   <project path="external/libvpx" name="platform/external/libvpx" groups="pdk" />
   <project path="external/libvterm" name="platform/external/libvterm" groups="pdk" />
   <project path="external/libxml2" name="platform/external/libxml2" groups="pdk,libxml2" />