BT: Fix memory leak when BT on & off done many times

Solves a memory leak in BatteryStatsService when Bluetooth
is turn on/off. Solution adds missing close of proxy then
Bluetooth is turned off.

Change-Id: I65f9db298459c7c15f6a10c752992f1d38469445
CRs-Fixed: 476145
HALO: fix the integer division bug

The newHeight is calculated by an integer division, which leads to an
ugly bug. E.g. a 95x96 image will get a newHeight of 0 because
(95 / 96 * 113) equals to 0. This will lead to a SystemUI FC.

Fix it by multipling first and dividing afterwards.
HALO: batch message icon for hdpi and mdpi

It's hard to keep up with Paul hehe