Allow guava to use java_host_for_device

Guava can't compile against a device bootclasspath, it uses methods
that only exist in the host bootclasspath, and then avoids calling
them at runtime.

Bug: 130306229
Test: m checkbuild
Change-Id: I012030cb701c01ea9ff554c1b6156d0242365a4c

android/neverallow.go

@@ -137,6 +137,7 @@ func createMediaRules() []*rule {
 
 func createJavaDeviceForHostRules() []*rule {
 	javaDeviceForHostProjectsWhitelist := []string{
+		"external/guava",
 		"external/robolectric-shadows",
 		"framework/layoutlib",
 	}