Disable CacheManager when using the Chrome HTTP stack.
Disable CacheManager when using the Chrome HTTP stack.

Currently, cacheDisabled() reports false, but no files are ever
added to the cache. This CL makes the framework more honest and
reports that the cache is disabled.

BUG=3270236

Change-Id: I13c0291ac295d965f71f1e70dbdebc74b95ddce0

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base