Remove prebuilts/maven_repo/android and google-play-service-client-libraries-3p

These prebuilts were needed for support library. Support library is being built separately
from the platform checkout, so these can now be removed.
Bug: 112007485
Change-Id: Id831cdf39dd56948c72cf45cffda2b9eb8fb783d

default.xml

@@ -592,9 +592,7 @@
   <project path="prebuilts/jdk/jdk8" name="platform/prebuilts/jdk/jdk8" groups="pdk" clone-depth="1" />
   <project path="prebuilts/jdk/jdk9" name="platform/prebuilts/jdk/jdk9" groups="pdk" clone-depth="1" />
   <project path="prebuilts/libs/libedit" name="platform/prebuilts/libs/libedit" groups="pdk-cw-fs,pdk-fs" clone-depth="1" />
-  <project path="prebuilts/maven_repo/android" name="platform/prebuilts/maven_repo/android" groups="pdk-cw-fs,pdk-fs" clone-depth="1" />
   <project path="prebuilts/maven_repo/bumptech" name="platform/prebuilts/maven_repo/bumptech" groups="pdk-cw-fs,pdk-fs" clone-depth="1" />
-  <project path="prebuilts/maven_repo/google-play-service-client-libraries-3p" name="platform/prebuilts/maven_repo/google-play-service-client-libraries-3p" clone-depth="1" />
   <project path="prebuilts/misc" name="platform/prebuilts/misc" groups="pdk" clone-depth="1" />
   <project path="prebuilts/ndk" name="platform/prebuilts/ndk" groups="pdk" clone-depth="1" />
   <project path="prebuilts/python/darwin-x86/2.7.5" name="platform/prebuilts/python/darwin-x86/2.7.5" groups="darwin,pdk,pdk-cw-fs,pdk-fs" clone-depth="1" />