Declare proguard_dictionary as implicit output of r8

Soong was generating proguard_dictionary, but not marking it as an
output, so ninja would fail with:
ninja: error: 'out/soong/.intermediates/bootable/recovery/tools/recovery_l10n/RecoveryLocalizer/android_common/proguard_dictionary', needed by 'out/target/common/obj/APPS/RecoveryLocalizer_intermediates/proguard_dictionary', missing and no known rule to make it

Fixes: 78770148
Test: mmma bootable/recovery/tools/recovery_l10n
Change-Id: I956f92519ea81d4fb1322114214099d46d734906

java/dex.go

@@ -238,14 +238,16 @@ func (j *Module) compileDex(ctx android.ModuleContext, flags javaBuilderFlags,
 	if useR8 {
 		// TODO(ccross): if this is an instrumentation test of an obfuscated app, use the
 		// dictionary of the app and move the app from libraryjars to injars.
-		j.proguardDictionary = android.PathForModuleOut(ctx, "proguard_dictionary")
+		proguardDictionary := android.PathForModuleOut(ctx, "proguard_dictionary")
+		j.proguardDictionary = proguardDictionary
 		r8Flags, r8Deps := j.r8Flags(ctx, flags)
 		ctx.Build(pctx, android.BuildParams{
-			Rule:        r8,
-			Description: "r8",
-			Output:      javalibJar,
-			Input:       classesJar,
-			Implicits:   r8Deps,
+			Rule:           r8,
+			Description:    "r8",
+			Output:         javalibJar,
+			ImplicitOutput: proguardDictionary,
+			Input:          classesJar,
+			Implicits:      r8Deps,
 			Args: map[string]string{
 				"dxFlags": strings.Join(dxFlags, " "),
 				"r8Flags": strings.Join(r8Flags, " "),