Revert "Use java.util.Objects instead on internal API"

This reverts commit 0886c6348bd95d87c5f2e62228d82f12232de848.
[1/2] Base: Add custom periods for data usage measurement

This commit adds week and day periods for data usage
measurement, instead of just months.

Change-Id: Ibd0067418435442d8cff922faf8ef0f6a5a28761