Add Jacoco support

Add support for instrumenting jars with jacoco.  Unlike in Make,
Jacoco in Soong is done entirely using jars.

Instrumentation is enabled by EMMA_INSTRUMENT=true, and affects
all apps.  If EMMA_INSTRUMENT_FRAMEWORK=true then it also affects
any java libraries listed in InstrumentFrameworkModules.

Bug: 69629238
Test: m EMMA_INSTRUMENT=true EMMA_INSTRUMENT_FRAMEWORK=true SKIP_BOOT_JARS_CHECK=true WITH_DEXPREOPT=false
Change-Id: If699715b277529cd7322ffca67c23b0746e1cccd
diff --git a/java/androidmk.go b/java/androidmk.go
index 1a4b27d..df83faa 100644
--- a/java/androidmk.go
+++ b/java/androidmk.go
@@ -42,6 +42,10 @@
 				}
 				fmt.Fprintln(w, "LOCAL_SDK_VERSION :=", String(library.deviceProperties.Sdk_version))
 				fmt.Fprintln(w, "LOCAL_SOONG_HEADER_JAR :=", library.headerJarFile.String())
+
+				if library.jacocoReportClassesFile != nil {
+					fmt.Fprintln(w, "LOCAL_SOONG_JACOCO_REPORT_CLASSES_JAR :=", library.jacocoReportClassesFile.String())
+				}
 			},
 		},
 		Custom: func(w io.Writer, name, prefix, moduleDir string, data android.AndroidMkData) {