It helps to catch the right exception.

Bug: 7238149
Change-Id: I7b60ec44d1d1d5ece8a871cb089f811b611f4a4a
Clarify the documentation of SparseArray.indexOfValue.

Bug: https://code.google.com/p/android/issues/detail?id=53297
Change-Id: I28725a2d03d4c11948bfe4fb90d730c86bf41481