Add prebuilts/abi-dumps/vndk and ndk to manifest.

Test: repo sync -j64, prebuilts/abi-dumps/vndk and
prebuilts/abi-dumps/ndk are synced.
Change-Id: Ifc2142cf1a672d488588224e4bbc917f288fb1ed

default.xml

@@ -487,6 +487,8 @@
   <project path="packages/wallpapers/LivePicker" name="platform/packages/wallpapers/LivePicker" groups="pdk-fs" />
   <project path="pdk" name="platform/pdk" groups="pdk" />
   <project path="platform_testing" name="platform/platform_testing" groups="pdk-fs,pdk-cw-fs,cts" />
+  <project path="prebuilts/abi-dumps/ndk" name="platform/prebuilts/abi-dumps/ndk"  clone-depth="1" />
+  <project path="prebuilts/abi-dumps/vndk" name="platform/prebuilts/abi-dumps/vndk"  clone-depth="1" />
   <project path="prebuilts/android-emulator" name="platform/prebuilts/android-emulator" groups="pdk-fs" clone-depth="1" />
   <project path="prebuilts/build-tools" name="platform/prebuilts/build-tools" groups="pdk" clone-depth="1" />
   <project path="prebuilts/checkstyle" name="platform/prebuilts/checkstyle" groups="pdk" clone-depth="1" />