Store dex jar paths in bootclasspath_fragment's apex content info

Previously, the DexBootJarPathForContentModule(module) simply called
directly through to the module to retrieve the dex jar path. This
change changes it so the bootclasspath_fragment retrieves the dex
jars from the module and stores them in the info structure for this
method to retrieve directly.

This makes it easier for the bootclasspath_fragment to stop retrieving
hidden API encoded dex jars from the module and perform the encoding
itself.

Bug: 179354495
Test: m com.android.art com.android.ipsec com.android.os.statsd com.android.conscrypt
      - verify that this does not change the contents of the apex files
Change-Id: Ic79dea080f10f4017f1a75d6d1fb5a3bfe04c2ce
diff --git a/apex/bootclasspath_fragment_test.go b/apex/bootclasspath_fragment_test.go
index 7f5e15c..9a8c7d0 100644
--- a/apex/bootclasspath_fragment_test.go
+++ b/apex/bootclasspath_fragment_test.go
@@ -512,7 +512,10 @@
 
 	checkFragmentExportedDexJar := func(name string, expectedDexJar string) {
 		module := result.Module(name, "android_common_apex10000")
-		dexJar := info.DexBootJarPathForContentModule(module)
+		dexJar, err := info.DexBootJarPathForContentModule(module)
+		if err != nil {
+			t.Error(err)
+		}
 		android.AssertPathRelativeToTopEquals(t, name+" dex", expectedDexJar, dexJar)
 
 		expectedCopyCommand := fmt.Sprintf("&& cp -f %s out/soong/.intermediates/myapex/android_common_myapex_image/image.apex/javalib/%s.jar", expectedDexJar, name)