Revert "Revert "Never strip and store dex files uncompressed when they are preopted on system.""

This reverts commit 67e8ec1973700bbdbc4cd68b3493d56d270ca377.

Test: build && atest android.text.cts.EmojiTest#testEmojiGlyphWebView on Cuttlefish
Exempt-From-Owner-Approval: Got +2 from Colin, latest PS is a rebase across conflicts.

Change-Id: I99faf0f2ec698d70c107516bd43756b9ddcb90d0
diff --git a/java/app.go b/java/app.go
index 9697582..05d1927 100644
--- a/java/app.go
+++ b/java/app.go
@@ -171,9 +171,18 @@
 	}
 
 	// Uncompress dex in APKs of privileged apps, and modules used by privileged apps.
-	return ctx.Config().UncompressPrivAppDex() &&
+	if ctx.Config().UncompressPrivAppDex() &&
 		(Bool(a.appProperties.Privileged) ||
-			inList(ctx.ModuleName(), ctx.Config().ModulesLoadedByPrivilegedModules()))
+			inList(ctx.ModuleName(), ctx.Config().ModulesLoadedByPrivilegedModules())) {
+		return true
+	}
+
+	// Uncompress if the dex files is preopted on /system.
+	if !a.dexpreopter.dexpreoptDisabled(ctx) && (ctx.Host() || !odexOnSystemOther(ctx, a.dexpreopter.installPath)) {
+		return true
+	}
+
+	return false
 }
 
 func (a *AndroidApp) aaptBuildActions(ctx android.ModuleContext) {
@@ -232,7 +241,6 @@
 }
 
 func (a *AndroidApp) dexBuildActions(ctx android.ModuleContext) android.Path {
-	a.deviceProperties.UncompressDex = a.shouldUncompressDex(ctx)
 
 	var installDir string
 	if ctx.ModuleName() == "framework-res" {
@@ -244,6 +252,9 @@
 		installDir = filepath.Join("app", a.installApkName)
 	}
 	a.dexpreopter.installPath = android.PathForModuleInstall(ctx, installDir, a.installApkName+".apk")
+	a.dexpreopter.isInstallable = Bool(a.properties.Installable)
+	a.dexpreopter.uncompressedDex = a.shouldUncompressDex(ctx)
+	a.deviceProperties.UncompressDex = a.dexpreopter.uncompressedDex
 
 	if ctx.ModuleName() != "framework-res" {
 		a.Module.compile(ctx, a.aaptSrcJar)