Add support in Telemetry for specifying exact Android APK

tools/telemetry/telemetry/core/exceptions.py

Index: tools/telemetry/telemetry/core/exceptions.py
diff --git a/tools/telemetry/telemetry/core/exceptions.py b/tools/telemetry/telemetry/core/exceptions.py
index 2a4bbea9880a86f65b658703adce036d2f4cc5eb..1181bce6b47d9c0bf15b2cfe63dc4e5aaccdf1dd 100644
--- a/tools/telemetry/telemetry/core/exceptions.py
+++ b/tools/telemetry/telemetry/core/exceptions.py
@@ -64,3 +64,15 @@ class EvaluateException(Exception):
 
 class ProfilingException(Exception):
   pass
+
+
+class PathMissingError(Exception):
+  """ Represents an exception thrown when an expected path doesn't exist. """
+
+
+class UnknownPackageError(Exception):
+  """ Represents an exception when encountering an unsupported Android APK. """
+
+
+class PackageDetectionError(Exception):
+  """ Represents an error when parsing an Android APK's package. """