Make inner class static

CarPropertyEventListenerToService is defined as an inner class rather
than a nested static class. This causes it to keep a reference to the
CarPropertyManager class (even though it uses a weakreference internally
and keep it alive even when it does not need to.

Bug: 132919164
Test: Compile
Change-Id: I3f155e27f7c85d72265b5ceb506df79acb59715b
(cherry picked from commit 24f9079412ee80d6dfd769486b5622bcf2ec733e)
1 file changed