Set default value for 'mBpfSupported' to fix asan issue in unit test.

Failed test case: BandwidthControllerTest.ManipulateSpecialApps

Bug: 117967202
Test: netd_unit_test, netd_integration_test, AddressSanitizer
Change-Id: Ibf86a6becb5c1dc5cc3d142f4b3cc7276bf40ca9
1 file changed