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
diff --git a/android/module.go b/android/module.go
index 2fa7d31..516fa78 100644
--- a/android/module.go
+++ b/android/module.go
@@ -931,12 +931,12 @@
 		bparams.Implicits = append(bparams.Implicits, params.Implicit.String())
 	}
 
-	bparams.Outputs = proptools.NinjaEscape(bparams.Outputs)
-	bparams.ImplicitOutputs = proptools.NinjaEscape(bparams.ImplicitOutputs)
-	bparams.Inputs = proptools.NinjaEscape(bparams.Inputs)
-	bparams.Implicits = proptools.NinjaEscape(bparams.Implicits)
-	bparams.OrderOnly = proptools.NinjaEscape(bparams.OrderOnly)
-	bparams.Depfile = proptools.NinjaEscape([]string{bparams.Depfile})[0]
+	bparams.Outputs = proptools.NinjaEscapeList(bparams.Outputs)
+	bparams.ImplicitOutputs = proptools.NinjaEscapeList(bparams.ImplicitOutputs)
+	bparams.Inputs = proptools.NinjaEscapeList(bparams.Inputs)
+	bparams.Implicits = proptools.NinjaEscapeList(bparams.Implicits)
+	bparams.OrderOnly = proptools.NinjaEscapeList(bparams.OrderOnly)
+	bparams.Depfile = proptools.NinjaEscapeList([]string{bparams.Depfile})[0]
 
 	return bparams
 }