Expand the dexpreopt image dependencies to entire image

Instead of just depending on the main .art file (boot.art, etc), also
expose the dependencies to the .oat/.vdex files (boot.oat/boot.vdex),
and all of the module files that get implicitly loading (boot-ext.*,
boot-framework.*, etc)

This is necessary for RBE, where the rule only gets the files that it
depends upon.

Test: treehugger
Test: build a system image with RBE
Change-Id: I0c7051f18582f1891d3398b46763b1521e4326c8

java/dexpreopt.go

@@ -132,8 +132,10 @@ func (d *dexpreopter) dexpreopt(ctx android.ModuleContext, dexJarFile android.Mo
 	}
 
 	var images android.Paths
+	var imagesDeps []android.Paths
 	for _, arch := range archs {
 		images = append(images, bootImage.images[arch])
+		imagesDeps = append(imagesDeps, bootImage.imagesDeps[arch])
 	}
 
 	dexLocation := android.InstallPathToOnDevicePath(ctx, d.installPath)
@@ -173,8 +175,9 @@ func (d *dexpreopter) dexpreopt(ctx android.ModuleContext, dexJarFile android.Mo
 		UsesLibraries:                d.usesLibs,
 		LibraryPaths:                 d.libraryPaths,
 
-		Archs:           archs,
-		DexPreoptImages: images,
+		Archs:               archs,
+		DexPreoptImages:     images,
+		DexPreoptImagesDeps: imagesDeps,
 
 		// We use the dex paths and dex locations of the default boot image, as it
 		// contains the full dexpreopt boot classpath. Other images may just contain a subset of