Relax boot image check to allow platform Jacoco variant in a coverage build.

Test: m nothing
Test: m EMMA_INSTRUMENT=true EMMA_INSTRUMENT_FRAMEWORK=true nothing

Bug: 153533941

Change-Id: I5847ec282f6b481cee61ed9ec6b6928c9a41fae7
Merged-In: I5847ec282f6b481cee61ed9ec6b6928c9a41fae7
(cherry picked from commit e0ce4ba491)

java/dexpreopt_bootjars.go

@@ -273,6 +273,9 @@ func getBootImageJar(ctx android.SingletonContext, image *bootImageConfig, modul
 		} else if isApexModule && apex.IsForPlatform() && Bool(module.(*Library).deviceProperties.Hostdex) {
 			// this is a special "hostdex" variant, skip it and resume search
 			return -1, nil
+		} else if name == "jacocoagent" && ctx.Config().IsEnvTrue("EMMA_INSTRUMENT_FRAMEWORK") {
+			// this is Jacoco platform variant for a coverage build, skip it and resume search
+			return -1, nil
 		} else {
 			// this (installable) jar is part of the platform, fail immediately
 			ctx.Errorf("module '%s' is part of the platform and not allowed in the ART boot image", name)