commit c8261752259d2d262accdc1975b60d39243ce25b
author Srinivas Paladugu <srnvs@google.com> Wed Jan 09 10:54:52 2019 -0800
committer Rajeev Kumar <rajekumar@google.com> Thu Jan 17 20:30:21 2019 +0000
tree 8fb665adc4c8444dc80c59df87d06215e754eca0
parent e59718c3d1480755a4b0cae997be93a536887bc2

Create a Zram writeback job

Zram on some devices can support writing idle pages
on to disk. ZramWriteback schedules jobs to track idle
pages and trigger write-to-disk when the device is idle.

Note: This is the same change that was reviewed in aosp. I am doing
a manual merge to avoid automerger merge conflicts.

Bug: 117682284
Bug: 122674343
Test: dumpsys jobscheduler
No jobs should be scheduled for devices with no support for
zram writeback or if they do not have low_ram flag set.

Change-Id: Id1bc41ac32f2c63e241270c10a07560bda39a127