manifest: update to android-9.0.0_r30

Change-Id: I294bf15a56e2f9f09f7fc8016e524ddeabb9fcb2

default.xml

@@ -4,7 +4,7 @@
   <remote  name="aosp"
            fetch="https://android.googlesource.com"
            review="https://android-review.googlesource.com/" />
-  <default revision="refs/tags/android-9.0.0_r21"
+  <default revision="refs/tags/android-9.0.0_r30"
            remote="aosp"
            sync-c="true"
            sync-j="12" />
@@ -283,7 +283,6 @@
   <project path="external/oj-libjdwp" name="platform/external/oj-libjdwp" groups="pdk" />
   <project path="external/okhttp" name="platform/external/okhttp" groups="pdk" />
   <project path="external/one-true-awk" name="platform/external/one-true-awk" groups="pdk" />
-  <project path="external/opencv" name="platform/external/opencv" groups="pdk-cw-fs,pdk-fs" />
   <project path="external/owasp/sanitizer" name="platform/external/owasp/sanitizer" groups="pdk" />
   <project path="external/parameter-framework" name="platform/external/parameter-framework" groups="pdk" />
   <project path="external/pcre" name="platform/external/pcre" groups="pdk" />