Revert "Split Java libraries per apex"

This reverts commit aa53324ac8.

Reason for revert: b/138337109 (broke ndk build)

Change-Id: I9497cb4337add3f8c491a684bcaadea3bdbfaa85

java/hiddenapi_singleton.go

@@ -152,14 +152,6 @@ func stubFlagsRule(ctx android.SingletonContext) {
 		// Collect dex jar paths for modules that had hiddenapi encode called on them.
 		if h, ok := module.(hiddenAPIIntf); ok {
 			if jar := h.bootDexJar(); jar != nil {
-				// For a java lib included in an APEX, only take the one built for
-				// the platform variant, and skip the variants for APEXes.
-				// Otherwise, the hiddenapi tool will complain about duplicated classes
-				if a, ok := module.(android.ApexModule); ok {
-					if android.InAnyApex(module.Name()) && !a.IsForPlatform() {
-						return
-					}
-				}
 				bootDexJars = append(bootDexJars, jar)
 			}
 		}