Rename names in java package to not have java prefix

Prefixing names in the java package with "java" is redundant, inside
the java package it is clear that they refer to something java
related, and outside the package they will be referred to with a
java. prefix.

Test: java_test.go
Change-Id: I9eb8eecb7ac5f6fbf8e87f5c219b3f50dbd18c87
diff --git a/java/app.go b/java/app.go
index fccd382..8a221ef 100644
--- a/java/app.go
+++ b/java/app.go
@@ -234,7 +234,7 @@
 		var depFile android.OptionalPath
 		if sdkDep, ok := module.(sdkDependency); ok {
 			depFile = android.OptionalPathForPath(sdkDep.ClasspathFile())
-		} else if javaDep, ok := module.(JavaDependency); ok {
+		} else if javaDep, ok := module.(Dependency); ok {
 			if ctx.OtherModuleName(module) == "framework-res" {
 				depFile = android.OptionalPathForPath(javaDep.(*AndroidApp).exportPackage)
 			}