Revert "Fix thread leakage"

This reverts commit 86f0501a8ebfda6ab550825126c5e86a169c5a87.

	modified:   nxp/jni/com_android_nfc.h
	modified:   nxp/jni/com_android_nfc_NativeLlcpServiceSocket.cpp
	modified:   src/com/android/nfc/ndefpush/NdefPushServer.java
	modified:   src/com/android/nfc/snep/SnepServer.java