Revert "Add Download Speeds in notification"

This reverts commit addd919d97a3192c3aa16ebd3fe73abb9faa194b.
Revert "DownloadProvider: add to support pause/resume download by manual"

This reverts commit ded2da137ce7c2c71ded2e6d163217ef95267ebb.
DownloadProvider: Add transfer speeds in notification

This will show transfer speed in notification when in expanded mode.
For multiple files, the combined speed are displayed.

Screenshot: http://i.imgur.com/xqLRvMo.png

PS1: Initial commit
PS2: clean code
     add missing declarations & import

Change-Id: I801dbe61c7ee59d0c1d14d5851ad6dc3a7678499
DownloadNotifier: Normal notification for singles

This builds upon the previous DownloadNotifier, but changes the notification style
when downloading single files by removing the big view.
See this post for more information:
https://plus.google.com/u/0/+Mart%C3%ADndelRosarioOK/posts/hgGcgsFqyp6

PS2: Fixing dependencies
PS3: Removing tabs/whitespace
PS4: Fix missing speed text after last patchset.
PS5: Restore previous change, fix missing time this time.
PS6: Reformat layout

Change-Id: Iaab38d7e7f9de3d9eb3deb5f061ee646b346c7cc
DownloadNotifier: Standardize play store and browser downloads

Image: http://i.imgur.com/w3VaRUK.png

PS1: Initial commit
PS2: Standardize all things!

Change-Id: I5e6c5def7dae10d714fd180693e95bc61205a57b
[2/2] Add to support pause/resume download

User can manually pause current download and resume to continue download remaining data of the file.
add a progressbar to show download progress. (only legacy View)
add pause/resume/stop/retry into notifications
add remaining time into notifications

PSs: Code cleanup.

Change-Id: I7c2c6043bd6e26c4d4b0c74265f87629967302a0
DownloadProvider: fix the crash when rotate screen.

TrampolineActivity will be recreated when rotate screen,
then the fragment is currently associated with any Activity.
So getActivity() will return a null and caused NullPointerException.

Add the null check before call finish().

CRs-Fixed: 640914

Change-Id: I76f368a597552e824d533b6a66ea23fad4c0cb41
DownloadProvider: add to support download into sdcard storage

When insert into downloads database to start a new download,
will check file uri destination is valid or not, currently it
only support phone storage downloading, what we do is to add
supporting sdcard storage downloading, this will make download
save path setting feature work well.

Change-Id: I7995ae63ec5769103d7ad66bcd677e383ef7f440