The default values are 25 (default) and 25 (increment). This is fine
for Stores that control downloads by # of messages, but won't work for
stores that use other measurements - e.g. EAS windows the download in #
of days. So for this change:
1. Allow the StoreInfo to provide non-default values
2. Remove the hardcoded references to the default values
3. Use StoreInfo values everywhere
4. Set the values to 1,1 in EAS store info
BUG=1789913
Automated import of CL 146331
4836f3c289