Add forgotten apex prefix to Jacoco boot image module.

This is a follow-up for https://r.android.com/1292915, which introduced
two-column format for the components of the boot jar list. This CL
fixes build failure for the coverage build.

Test: m EMMA_INSTRUMENT=true EMMA_INSTRUMENT_FRAMEWORK=true
Change-Id: Ib8b156bf81943fe07084cbce5e7e9bf70e759a5d

java/dexpreopt_config.go

@@ -117,7 +117,7 @@ func genBootImageConfigs(ctx android.PathContext) map[string]*bootImageConfig {
 		artModules := global.ArtApexJars
 		// With EMMA_INSTRUMENT_FRAMEWORK=true the Core libraries depend on jacoco.
 		if ctx.Config().IsEnvTrue("EMMA_INSTRUMENT_FRAMEWORK") {
-			artModules = append(artModules, "jacocoagent")
+			artModules = append(artModules, "com.android.art:jacocoagent")
 		}
 		frameworkModules := android.RemoveListFromList(global.BootJars, artModules)