Rename UpdatableBootJars to ApexBootJars.

Note that ART apex boot jars and core-icu4j are exceptions here as they
are not part of ApexBootJars. ART apex boot jars are defined in their
own variable, while core-icu4j is treated as a regular non-updatable
boot jar.

Bug: 191127295
Test: atest CtsClasspathsTestCases
Change-Id: I3cea3d82ef521655a1a5ffa8cae2258ab9d08bfc
diff --git a/java/bootclasspath_fragment.go b/java/bootclasspath_fragment.go
index 503c31f..d547fd1 100644
--- a/java/bootclasspath_fragment.go
+++ b/java/bootclasspath_fragment.go
@@ -537,15 +537,11 @@
 
 	global := dexpreopt.GetGlobalConfig(ctx)
 
-	possibleUpdatableModules := gatherPossibleUpdatableModuleNamesAndStems(ctx, b.properties.Contents, bootclasspathFragmentContentDepTag)
-
-	// Only create configs for updatable boot jars. Non-updatable boot jars must be part of the
-	// platform_bootclasspath's classpath proto config to guarantee that they come before any
-	// updatable jars at runtime.
-	jars := global.UpdatableBootJars.Filter(possibleUpdatableModules)
+	possibleUpdatableModules := gatherPossibleApexModuleNamesAndStems(ctx, b.properties.Contents, bootclasspathFragmentContentDepTag)
+	jars := global.ApexBootJars.Filter(possibleUpdatableModules)
 
 	// TODO(satayev): for apex_test we want to include all contents unconditionally to classpaths
-	// config. However, any test specific jars would not be present in UpdatableBootJars. Instead,
+	// config. However, any test specific jars would not be present in ApexBootJars. Instead,
 	// we should check if we are creating a config for apex_test via ApexInfo and amend the values.
 	// This is an exception to support end-to-end test for SdkExtensions, until such support exists.
 	if android.InList("test_framework-sdkextensions", possibleUpdatableModules) {