Expect added members for instrumented modules

hiddenapi expects that all members in a class to have corresponding hidden
API flags. However, this can't be satisfied when the java module having
the class is instrumented; JaCoCo added a few number of synthetic
members. In this case, give 'no-force-assign-all' option to the hidden
api tool so that it doesn't complain about the synthetic methods.

Also, disabling instrumenting jacocoagent itself, because it doesn't
make sense.

Exempt-From-Owner-Approval: PS3 fixes a typo in a comment. PS2 got ORV.

Bug: 149353192
Test: SKIP_ABI_CHECKS=true EMMA_INSTRUMENT=true
EMMA_INSTRUMENT_FRAMEWORK=true SKIP_BOOT_JARS_CHECK=true m
out/soong/.intermediates/external/apache-xml/apache-xml/android_common_com.android.art.debug/hiddenapi/unaligned/unaligned.jar
Change-Id: Ibaf383c439945ab664e885af319548b56e2c8cb6
diff --git a/java/java.go b/java/java.go
index b33cb2a..b3aca49 100644
--- a/java/java.go
+++ b/java/java.go
@@ -1519,8 +1519,11 @@
 		j.headerJarFile = j.implementationJarFile
 	}
 
-	// Force enable the instrumentation for java code that is built for APEXes
-	if android.DirectlyInAnyApex(ctx, ctx.ModuleName()) && !j.IsForPlatform() {
+	// Force enable the instrumentation for java code that is built for APEXes ...
+	// except for the jacocoagent itself (because instrumenting jacocoagent using jacocoagent
+	// doesn't make sense)
+	isJacocoAgent := ctx.ModuleName() == "jacocoagent"
+	if android.DirectlyInAnyApex(ctx, ctx.ModuleName()) && !isJacocoAgent && !j.IsForPlatform() {
 		j.properties.Instrument = true
 	}