Specifying -1 for both low and highwater marks would not actually do the right thing
Specifying -1 for both low and highwater marks would not actually do the right thing

before this change. Also make it more consistent in that specifying -1 for the
keepalive settings specifies the default.

Change-Id: I086f530fbf42abce66d1c8e61157215cb474e044

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