Remove the dependency on ICU

Static libxml2 no longer requires ICU4C. Remove
the depedency from the build file.

Bug: 121468463
Test: vts-tradefed run vts -m VtsHalAudioEffectV4_0Target
Test: vts-tradefed run vts -m VtsHalAudioV4_0Target
Merged-In: Ib843fb1071a634f25e27e5291b00d11852ac08a9
Change-Id: Ib843fb1071a634f25e27e5291b00d11852ac08a9
4 files changed