Revert^2 "Remove compilation actions from java sdk library"

This change modifies the build actions of java_sdk_library module type
so that it does not perform any compilation actions (i.e. does not
create the top level java_sdk_library jar file). Instead, it delegates
the build actions the top level jar file was performing to the
dynamically created ".impl"-suffixed java library module. The build
actions that are delegated to the impl library module include hiddenapi
processing, dexing, and dexpreopt.

This change relands https://r.android.com/3035972. Implementation
changes from the original change:
- "all_apex_contributions" is added as a dependecy to the implementation
  library modules where the parent sdk_library module has a prebuilt
  equivalent. This allows the source apex variant to be hidden from make
  when the prebuilt is active.

Test: patch in internal main, lunch barbet-ap2a-userdebug && m nothing
Test: m nothing --no-skip-soong-tests
Bug: 332785297
Change-Id: I017938e5567aef82e428e7ceb557d9c9090e0257

android/testing.go

@@ -1122,7 +1122,7 @@ func AndroidMkEntriesForTest(t *testing.T, ctx *TestContext, mod blueprint.Modul
 
 	entriesList := p.AndroidMkEntries()
 	aconfigUpdateAndroidMkEntries(ctx, mod.(Module), &entriesList)
-	for i, _ := range entriesList {
+	for i := range entriesList {
 		entriesList[i].fillInEntries(ctx, mod)
 	}
 	return entriesList