Fix program info call over-saturation.

It was an omission to not allow onCurrentProgramInfoChanged
to be called more than once.

Bug: 120186193
Test: atest VtsHalBroadcastradioV2_0TargetTest
Change-Id: I667c552fb88e8fa3be3931901f7ba86ee7743baa
(cherry picked from commit 3f71e6c33ae34065cbf40ce1a2e4f9914383f969)
1 file changed