notifications: set ongoing & localize some strings.

Change-Id: I2947711cfd1178e5cb4d3ceb5f98499115e37f00
Add setting to change transfer speed units

 * Included Mb/s MiB/s and KiB/s
 * Left the settings unorganized, will organize once more are added.

Change-Id: I35ab4b731924bf554bdb507016b82dca96347281
beam: Make use of LinearLayout's

LinearLayout's are much easier to maninpulate, and easier to manage left
over space.

Change-Id: Iebba5a6828038ea56856733dd9c7c3711b8a2cca