adb: call android::base::InitLogging even when adb tracing is disabled

This is a follow-up to https://android-review.googlesource.com/153623
which prevented android::base::InitLogging() from being called when
tracing was disabled.

It is ok to call InitLogging() on a device or host because calling it
does not imply that a logging file is used, which was the reason for
not calling it on a device.

So this change should preserve the device behavior of not using a
logging file when tracing is disabled, plus it will call InitLogging()
all the time in case logging APIs are called.

Change-Id: I3fd6ba2c567f67a2f111a85f174893fbf866ec57
Signed-off-by: Spencer Low <CompareAndSwap@gmail.com>
diff --git a/adb.cpp b/adb.cpp
index 821b785..fc7320c 100644
--- a/adb.cpp
+++ b/adb.cpp
@@ -192,16 +192,13 @@
 }
 
 void adb_trace_init(char** argv) {
+#if !ADB_HOST
     // Don't open log file if no tracing, since this will block
     // the crypto unmount of /data
-    const std::string trace_setting = get_trace_setting();
-    if (trace_setting.empty()) {
-        return;
-    }
-
-#if !ADB_HOST
-    if (isatty(STDOUT_FILENO) == 0) {
-        start_device_log();
+    if (!get_trace_setting().empty()) {
+        if (isatty(STDOUT_FILENO) == 0) {
+            start_device_log();
+        }
     }
 #endif