Expand abbreviation in average memory usage string

We shouldn't use a technical abbrevation of "avg" here for the common
word "average" now that it's exposed to all users in app info settings,
since we can't expect everyone to know what "avg" stands for.

Languages other than English have been left alone because it looks like
most of them are already using the expanded word.

Change-Id: If7d8881a6a7e135d69f8b07f80119dd5a768fc49
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
6 files changed