Add backwards compatible default value for NR timing advance

Test: atest SignalStrengthTest
Bug: 141097448
Bug: 266825334
Change-Id: I97413b651fa99d4a0e119d4af670fb7216fca704
diff --git a/radio/aidl/aidl_api/android.hardware.radio.network/current/android/hardware/radio/network/NrSignalStrength.aidl b/radio/aidl/aidl_api/android.hardware.radio.network/current/android/hardware/radio/network/NrSignalStrength.aidl
index 2055024..7d6ab82 100644
--- a/radio/aidl/aidl_api/android.hardware.radio.network/current/android/hardware/radio/network/NrSignalStrength.aidl
+++ b/radio/aidl/aidl_api/android.hardware.radio.network/current/android/hardware/radio/network/NrSignalStrength.aidl
@@ -42,5 +42,5 @@
   int csiSinr;
   int csiCqiTableIndex;
   byte[] csiCqiReport;
-  int timingAdvance;
+  int timingAdvance = 0x7FFFFFFF;
 }
diff --git a/radio/aidl/android/hardware/radio/network/NrSignalStrength.aidl b/radio/aidl/android/hardware/radio/network/NrSignalStrength.aidl
index 2314562..30ae067 100644
--- a/radio/aidl/android/hardware/radio/network/NrSignalStrength.aidl
+++ b/radio/aidl/android/hardware/radio/network/NrSignalStrength.aidl
@@ -77,5 +77,5 @@
      * INT_MAX: 0x7FFFFFFF denotes invalid/unreported value.
      * Reference: 3GPP 36.213 section 4.2.3
      */
-    int timingAdvance;
+    int timingAdvance = 0x7FFFFFFF;
 }