ResourcesImpl.ThemeImpl NativeAllocationRegistry

Native allocations that hold theme data can be several KBs. Registering
the native allocation using NativeAllocationRegistry helps induce the GC
to free the malloced memory sooner and alleviate memory pressure.

Bug: 187883085
Bug: 141198925
Test: atest ResourcesPerfWorkloads
Change-Id: I2710cfea19565ea8aaf2b5fbd7b2c05d9cb17182