Allow specifying which packages to send a broadcast to.

Add BroadcastOptions.setIncludedPackages() that allows
specifying which packages to send a broadcast to.

Bug: 421215310
Test: atest tests/app/BroadcastsTest/src/android/app/cts/broadcasts/BroadcastOptionsIncludedPackagesTest.java
Flag: EXEMPT hidden api - there shouldn't be any effect until a client uses it
Change-Id: I32d5ec6b031cfefb3a48868e5f243449a41a6c1e