Change the name of source files to replace "vpx" with "aom". Change occurences of "vpx" in the code to "aom". Change-Id: I002c0eaa2c350cf1a895bf01bea5788c61328027
Change-Id: I79d52362aec9565cc4b6fe7a1c1c08dcfb726465
Change-Id: Ibc7933fba85feeb30ef9b14b302d932aff19f54e