use aliased //external/guava target

Guava has a new alias to provide the host JRE version or the Android
device version depending on the Bazel configuration of the dependency
edge that requires it.

Bug: 215229742
Test: b build //packages/apps/QuickSearchBox
Change-Id: I6008a479074a7e097342fe109e776bc7594885d9
1 file changed