clean up pdk_config.mk
clean up pdk_config.mk

- define ...JAVA_ZIP_... variables only when necessary
- fix missed case for TARGET_BUILD_JAVA_SUPPORT_LEVEL definition

Change-Id: I4f491ff212fd1e973a77499bbf3fd8d1940bb1f8

xorware/android_build,xorware/android_build,xorware/android_build,see4ri/lolili,fallouttester/platform_manifest,hagar006/platform_manifest,knone1/platform_manifest,pranav01/platform_manifest,RR-msm7x30/platform_manifest,xorware/android_build,ND-3500/platform_manifest,Hybrid-Power/startsync,xorware/android_build