Replace *Escape with *EscapeList

Follow the change to blueprint to make *Escape take and return a string
and add *EscapeList that take and return slices of strings.  Fix up
a few places that were unnecessarily converting a string to a slice
and back to a string.

Test: m nothing
Change-Id: I3fa87de175522205f36544ef76aa2f04aef1b936

java/app_builder.go

@@ -224,7 +224,7 @@ func TransformJniLibsToJar(ctx android.ModuleContext, outputFile android.Writabl
 		Output:      outputFile,
 		Implicits:   deps,
 		Args: map[string]string{
-			"jarArgs": strings.Join(proptools.NinjaAndShellEscape(jarArgs), " "),
+			"jarArgs": strings.Join(proptools.NinjaAndShellEscapeList(jarArgs), " "),
 		},
 	})
 }