Make htmlGzNotice an internal variable instead of apexBundle field.

It's not read outside of the function / action generation logic, so keep
it inside the function.

Test: presubmits
Fixes: 190817312
Change-Id: I0626e6c86adc584abb2a251cbc7ffb1bec2c7f59
diff --git a/apex/apex.go b/apex/apex.go
index 09de2d4..a2ab995 100644
--- a/apex/apex.go
+++ b/apex/apex.go
@@ -455,9 +455,6 @@
 	// Processed file_contexts files
 	fileContexts android.WritablePath
 
-	// Path to notice file in html.gz format.
-	htmlGzNotice android.WritablePath
-
 	// The built APEX file. This is the main product.
 	// Could be .apex or .capex
 	outputFile android.WritablePath
@@ -1903,9 +1900,6 @@
 	apexType := a.properties.ApexType
 	switch apexType {
 	case imageApex:
-
-		// TODO(b/190817312): Generate the notice file from the apex rule.
-		a.htmlGzNotice = android.PathForBazelOut(ctx, "NOTICE.html.gz")
 		a.bundleModuleFile = android.PathForBazelOut(ctx, outputs.BundleFile)
 		a.nativeApisUsedByModuleFile = android.ModuleOutPath(android.PathForBazelOut(ctx, outputs.SymbolsUsedByApex))
 		a.nativeApisBackedByModuleFile = android.ModuleOutPath(android.PathForBazelOut(ctx, outputs.BackingLibs))
diff --git a/apex/builder.go b/apex/builder.go
index e4c1673..9e368b6 100644
--- a/apex/builder.go
+++ b/apex/builder.go
@@ -650,9 +650,9 @@
 		}
 
 		// Create a NOTICE file, and embed it as an asset file in the APEX.
-		a.htmlGzNotice = android.PathForModuleOut(ctx, "NOTICE.html.gz")
+		htmlGzNotice := android.PathForModuleOut(ctx, "NOTICE.html.gz")
 		android.BuildNoticeHtmlOutputFromLicenseMetadata(
-			ctx, a.htmlGzNotice, "", "",
+			ctx, htmlGzNotice, "", "",
 			[]string{
 				android.PathForModuleInstall(ctx).String() + "/",
 				android.PathForModuleInPartitionInstall(ctx, "apex").String() + "/",
@@ -660,7 +660,7 @@
 		noticeAssetPath := android.PathForModuleOut(ctx, "NOTICE", "NOTICE.html.gz")
 		builder := android.NewRuleBuilder(pctx, ctx)
 		builder.Command().Text("cp").
-			Input(a.htmlGzNotice).
+			Input(htmlGzNotice).
 			Output(noticeAssetPath)
 		builder.Build("notice_dir", "Building notice dir")
 		implicitInputs = append(implicitInputs, noticeAssetPath)