Android: Automaticaly add MANAGE_EXTERNAL_STORAGE permission to apps

This prevents the user from needing to click through a permission
granting screen on their device before the agent is able to run on the
device, but only does so if the API level is >= 30 (where this
permission has effect at all [0]) and if a particular property is set on
the device (`debug.renderdoc.autograntpermissions`) so as to avoid
potential pitfalls on unusual Android devices.

[0] https://developer.android.com/reference/android/Manifest.permission#MANAGE_EXTERNAL_STORAGE

renderdoc/android/android.cpp

@@ -1220,6 +1220,17 @@ struct AndroidController : public IDeviceProtocolHandler
       for(Android::ABI abi : abis)
         Android::adbExecCommand(deviceID, "shell am force-stop " + GetRenderDocPackageForABI(abi));
 
+      // Attempt to prevent the user needing to click through on permissions
+      rdcstr auto_grant_permissions =
+          Android::adbExecCommand(deviceID, "shell getprop debug.renderdoc.autograntpermissions")
+              .strStdout.trimmed();
+      if(apiVersion >= 30 && atoi(auto_grant_permissions.c_str()) == 1)
+      {
+        for(Android::ABI abi : abis)
+          Android::adbExecCommand(deviceID, "shell pm grant " + GetRenderDocPackageForABI(abi) +
+                                                " android.permission.MANAGE_EXTERNAL_STORAGE");
+      }
+
       Android::adbForwardPorts(dev.portbase, deviceID, 0, 0, false);
       Android::ResetCaptureSettings(deviceID);