dbus: add support for synchronous PropertySet::Get
The existing PropertySet::Get function is asynchronous.
This CL adds the synchronous version of PropertySet::Get.
It is defined as PropertySet::GetAndBlock.
Also fix some typos and indent problems in previous
introduced SetAndBlock().
BUG=https://b.corp.google.com/u/0/issues/24131409
TEST=manually tested
Review URL: https://codereview.chromium.org/1368713002
Cr-Commit-Position: refs/heads/master@{#351185}
CrOS-Libchrome-Original-Commit: a5523d02410fc00401b569cfcac06f71b09b1c66
2 files changed