Determine the bluetooth address of an input device from its uniqueId

Since the Android Bluetooth stack sets a Bluetooth HID device's unique
ID as the Bluetooth address, attempt to parse the address from an input
device's uniqueId when connected over the Bluetooth bus.

DD: go/inputdevice-battery-notifications

Bug: 243005009
Test: manual, check dumpsys output
Change-Id: I710868f2b202e6cebf8b6a3853a6a5c79f3bc671

1 files changed, 7 insertions, 3 deletions

diff --git a/include/input/PrintTools.h b/include/input/PrintTools.h
index 55f730b287..e24344b3f1 100644
--- a/include/input/PrintTools.h
+++ b/include/input/PrintTools.h
@@ -24,16 +24,20 @@
 namespace android {
 
 template <typename T>
-std::string constToString(const T& v) {
+inline std::string constToString(const T& v) {
     return std::to_string(v);
 }
 
+inline std::string constToString(const std::string& s) {
+    return s;
+}
+
 /**
  * Convert an optional type to string.
  */
 template <typename T>
-std::string toString(const std::optional<T>& optional,
-                     std::string (*toString)(const T&) = constToString) {
+inline std::string toString(const std::optional<T>& optional,
+                            std::string (*toString)(const T&) = constToString) {
     return optional ? toString(*optional) : "<not set>";
 }