Deleted clang property in Andrioid.bp files.

Clang property has been depecrated and defaulting to true since 2018.
deleted from Android.bp files using bpmodify:

go run  bpmodify.go -w -m=module_names, -remove-property=true -property=clang filepath

Bug: 208980553
Test: m nothing & treehugger

Change-Id: I7a7c286d1382932647eafdf9808d3895d369f62f