Rename fields in dexpreopt config

Add 'host' into the name of fields regarding path on the host side to
distinguish between paths on the device(which will be added in the
following commit), and paths on the host.

Bug: 158843648
Test: build and flash, and then
  adb wait-for-device \
    && adb -s $S root \
    && adb -s $S logcat \
    | grep -E 'ClassLoaderContext [a-z ]+ mismatch' -C 1
Change-Id: Ib2645ed51591ba2f4b726c115b401ad2bd6675da

java/dexpreopt_config.go

@@ -84,26 +84,26 @@ func genBootImageConfigs(ctx android.PathContext) map[string]*bootImageConfig {
 		artModules := global.ArtApexJars
 		frameworkModules := global.BootJars.RemoveList(artModules)
 
-		artSubdir := "apex/art_boot_images/javalib"
+		artDirOnHost := "apex/art_boot_images/javalib"
 		frameworkSubdir := "system/framework"
 
 		// ART config for the primary boot image in the ART apex.
 		// It includes the Core Libraries.
 		artCfg := bootImageConfig{
-			name:          artBootImageName,
-			stem:          "boot",
-			installSubdir: artSubdir,
-			modules:       artModules,
+			name:             artBootImageName,
+			stem:             "boot",
+			installDirOnHost: artDirOnHost,
+			modules:          artModules,
 		}
 
 		// Framework config for the boot image extension.
 		// It includes framework libraries and depends on the ART config.
 		frameworkCfg := bootImageConfig{
-			extends:       &artCfg,
-			name:          frameworkBootImageName,
-			stem:          "boot",
-			installSubdir: frameworkSubdir,
-			modules:       frameworkModules,
+			extends:          &artCfg,
+			name:             frameworkBootImageName,
+			stem:             "boot",
+			installDirOnHost: frameworkSubdir,
+			modules:          frameworkModules,
 		}
 
 		configs := map[string]*bootImageConfig{
@@ -130,11 +130,11 @@ func genBootImageConfigs(ctx android.PathContext) map[string]*bootImageConfig {
 			// Create target-specific variants.
 			for _, target := range targets {
 				arch := target.Arch.ArchType
-				imageDir := c.dir.Join(ctx, target.Os.String(), c.installSubdir, arch.String())
+				imageDir := c.dir.Join(ctx, target.Os.String(), c.installDirOnHost, arch.String())
 				variant := &bootImageVariant{
 					bootImageConfig: c,
 					target:          target,
-					images:          imageDir.Join(ctx, imageName),
+					imagePathOnHost: imageDir.Join(ctx, imageName),
 					imagesDeps:      c.moduleFiles(ctx, imageDir, ".art", ".oat", ".vdex"),
 					dexLocations:    c.modules.DevicePaths(ctx.Config(), target.Os),
 				}
@@ -148,7 +148,7 @@ func genBootImageConfigs(ctx android.PathContext) map[string]*bootImageConfig {
 		// specific to the framework config
 		frameworkCfg.dexPathsDeps = append(artCfg.dexPathsDeps, frameworkCfg.dexPathsDeps...)
 		for i := range targets {
-			frameworkCfg.variants[i].primaryImages = artCfg.variants[i].images
+			frameworkCfg.variants[i].primaryImages = artCfg.variants[i].imagePathOnHost
 			frameworkCfg.variants[i].dexLocationsDeps = append(artCfg.variants[i].dexLocations, frameworkCfg.variants[i].dexLocationsDeps...)
 		}