Fix CTS-on-GSI testDownloadManager test run failure

Cts case android.app.cts.DownloadManagerTest#testDownloadManager and
android.appsecurity.cts.ExternalStorageHostTest#testExternalStorageNone
does HTTP clearText downloading from domain "local" and "example.com".
On Android P, networkSecurityConfig XML file is neeed for HTTP clearText
 downloading.

Bug: 113832289
Test: Build CTS
Test: run cts -m CtsAppSecurityHostTestCases -t
android.appsecurity.cts.ExternalStorageHostTest#testExternalStorageNone
Test: run cts -m CtsAppTestCases -t
android.app.cts.DownloadManagerTest#testDownloadManager

Change-Id: I5adeabc2e401d39a1a0e0dee2c661d0c17a49e51
Signed-off-by: Yan Laijun <yan-laijun@xiaomi.com>
2 files changed