Use generics for DepSets

Use Go's generics for DepSets so they don't require a type-specific
wrapper and reflection.

Test: depsets_test.go
Change-Id: I22ba0b7d680d37d2cd05230b0f560d166c4dd20b
diff --git a/aidl_library/aidl_library_test.go b/aidl_library/aidl_library_test.go
index d9dd245..0205629 100644
--- a/aidl_library/aidl_library_test.go
+++ b/aidl_library/aidl_library_test.go
@@ -52,7 +52,7 @@
 		t,
 		"aidl include dirs",
 		[]string{"package_foo/a", "package_bar/x"},
-		actualInfo.IncludeDirs.ToList().Strings(),
+		android.Paths(actualInfo.IncludeDirs.ToList()).Strings(),
 	)
 
 	android.AssertPathsRelativeToTopEquals(
@@ -101,7 +101,7 @@
 		t,
 		"aidl include dirs",
 		[]string{"package_foo", "package_bar"},
-		actualInfo.IncludeDirs.ToList().Strings(),
+		android.Paths(actualInfo.IncludeDirs.ToList()).Strings(),
 	)
 
 	android.AssertPathsRelativeToTopEquals(