Adjust AM/FM region ranges.

Bug: 64541927
Test: instrumentation
Change-Id: I34ea5b0b426f0c0c73d1cbc2d64cb67e2d4b7bd6
diff --git a/broadcastradio/1.1/default/BroadcastRadio.cpp b/broadcastradio/1.1/default/BroadcastRadio.cpp
index 38b4b99..1bcfd82 100644
--- a/broadcastradio/1.1/default/BroadcastRadio.cpp
+++ b/broadcastradio/1.1/default/BroadcastRadio.cpp
@@ -64,7 +64,7 @@
             }),
             AmFmBandConfig({
                 Band::FM_HD,
-                87900,   // lowerLimit
+                87700,   // lowerLimit
                 107900,  // upperLimit
                 {200},   // spacings
             }),