Do not suppress incoming call HUN, if AAP is not in foreground

Only suppress incoming call HUNs, while there's an active foreground AAP
session.

Bug: 169229213
Fixes: 169229213
Test: manual
Change-Id: I0a11123d78c686f577bb4f402aefc1130c5f51a2
1 file changed
tree: 2fa2e2eb3ec9cac06dd162bcef3e0a38f810cc13
  1. res/
  2. src/
  3. tests/
  4. Android.bp
  5. AndroidManifest.xml
  6. OWNERS
  7. PREUPLOAD.cfg