Don't spam the system with unique wake lock names.

Causing stuff like this:

  u0a32:
    Wifi Running: 0ms (0.0%)
    Full Wifi Lock: 0ms (0.0%)
    Wifi Scan: 2s 439ms (0.0%) 1x
    User activity: 202 other
    Wake lock DozeService.03748b1c: 2s 801ms partial (8 times) realtime
    Wake lock DozeService.032e94c3 realtime
    Wake lock RingtonePlayer: 1s 953ms partial (37 times) realtime
    Wake lock DozeService.06e2b341: 1s 617ms partial (1 times) realtime
    Wake lock DozeService.0c666b2d: 1s 710ms partial (6 times) realtime
    Wake lock DozeService.0c3246f3: 62ms partial (1 times) realtime
    Wake lock *alarm*: 6s 597ms partial (124 times) realtime
    Wake lock DozeService.076ab6cd: 4s 140ms partial (2 times) realtime
    Wake lock DozeService.0770699b: 1s 81ms partial (5 times) realtime
    Wake lock DozeService.0af8d9f8 realtime
    Wake lock DozeService.0736a8b0 realtime
    Wake lock DozeService.0712323f: 1s 623ms partial (5 times) realtime
    Wake lock AudioMix: 25s 564ms partial (23 times) realtime
    Wake lock DozeService.023a9e24: 7ms partial (1 times) realtime
    Wake lock DozeService.05de1d88: 69ms partial (1 times) realtime
    Wake lock DozeService.0b5aad30: 7ms partial (1 times) realtime
    Wake lock DozeService.00e6852a realtime
    Wake lock DozeService.00cc0dfa realtime
    Wake lock DozeService.06204317: 2s 322ms partial (8 times) realtime
    Wake lock show keyguard: 1s 335ms partial (7 times) realtime
    Wake lock DozeService.0f746baf: 2s 306ms partial (4 times) realtime
    Wake lock DozeService.04f73f13: 2s 251ms partial (7 times) realtime
    Wake lock DozeService.0f4379e3: 3s 283ms partial (12 times) realtime
    Wake lock DozeService.04de987c: 4s 127ms partial (18 times) realtime
    Wake lock DozeService.0a87e24b: 2s 62ms partial (7 times) realtime
    Wake lock DozeService.0a4c4d58 realtime
    Wake lock DozeService.059a9c2e: 1s 235ms partial (1 times) realtime
    Wake lock DozeService.0e9a606b: 2s 965ms partial (9 times) realtime
    Wake lock DozeService.08cabaef: 2s 809ms partial (1 times) realtime
    Wake lock DozeService.0e6a6252: 3s 401ms partial (9 times) realtime
    Wake lock DozeService.03f408a5: 2s 879ms partial (9 times) realtime
    Wake lock DozeService.03c55444: 179ms partial (1 times) realtime
    Wake lock DozeService.03a5adbf: 2s 257ms partial (9 times) realtime
    Wake lock DozeService.099fd79e: 3s 501ms partial (10 times) realtime
    Wake lock DozeService.0ce77121: 2s 908ms partial (9 times) realtime
    Wake lock DozeService.0cbc7a2c: 319ms partial (1 times) realtime
    Wake lock Window:StatusBar: 6s 753ms draw (30 times) realtime
    Wake lock DozeService.02fa9d50: 233ms partial (1 times) realtime

Change-Id: Ie6d01abcea9f58f32d5ad3f769cb3dfb34ca7289