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/jacoco.go

@@ -106,7 +106,7 @@ func jacocoFiltersToSpecs(filters []string) ([]string, error) {
 			return nil, err
 		}
 	}
-	return proptools.NinjaAndShellEscape(specs), nil
+	return proptools.NinjaAndShellEscapeList(specs), nil
 }
 
 func jacocoFilterToSpec(filter string) (string, error) {